Disavow only in Manual Action cases
As Stephen mentioned, according to Google:
You should disavow backlinks only if:
- You have a considerable number of spammy, artificial, or low-quality links pointing to your site,
AND
- The links have caused a manual action, or likely will cause a manual action, on your site.
So, if you have a solid reason to believe that your website will receive a manual action - e.g. if you have been doing blackhat link building - then the disavow tool could be considered.
If you do not have a manual action against your site, and you don't "think you're about to get such a manual action (because of paid links or other link schemes that violate our quality guidelines)" , then use of the disavow tool can be more harmful than helpful. Google also states this in their original blog post about the Disavow Tool:
If you've been notified of a manual spam action based on "unnatural links" pointing to your site, this tool can help you address the issue. If you haven't gotten this notification, this tool generally isn't something you need to worry about.
A new tool to disavow links | Google Search Central Blog
Do Manual Clean-up First
Furthermore the disavow tool is designed to be used after you clean up unnatural links you've built from other websites, so emailing those sites and requesting removal of those links is the first step. It doesn't sound like you've been doing black-hat link building though, so that's another reason the disavow tool might not be helpful.
Right now it can be a difficult task to clean up a site’s backlinks, and from listening to the SEO community we wanted to provide a tool that could help after site owners had already taken substantial steps to try to clean up their site’s backlinks.
Matt Cutts, former Head of Web Spam, Google
"The vast, vast majority of sites do not need to use this tool in any way."
From the blog post:
Q: Will most sites need to use this tool?
A: No. The vast, vast majority of sites do not need to use this tool in any way. If you're not sure what the tool does or whether you need to use it, you probably shouldn't use it.
A new tool to disavow links | Google Search Central Blog
The fact that your question here is about a somewhat subjective edge case is evidence to me that the disavow tool is not the right tool for this job.
If you didn't create these links, it's not your problem
Q: I didn't create many of the links I'm seeing. Do I still have to do the work to clean up these links?
A: Typically not. Google normally gives links appropriate weight, and under normal circumstances you don't need to give Google any additional information about your links. A typical use case for this tool is if you've done link building that violates our quality guidelines, Google has sent you a warning about unnatural links, and despite your best efforts there are some links that you still can't get taken down.
A new tool to disavow links | Google Search Central Blog
Google is already excellent at filtering out spam
From your question it seems like you are not being specifically targeted in a direct way, but that you are getting a base level of spammy links back from these sites just as everyone else are, i.e. from your post "Everyone already knows these sites." With that in mind, Google anticipates some a certain background level of internet backlink spam and accounts for it in their algorithm:
In general, Google works hard to prevent other webmasters from being able to harm your ranking. However, if you're worried that some backlinks might be affecting your site's reputation, you can use the Disavow Links tool to indicate to Google that those links should be ignored. Again, we build our algorithms with an eye to preventing negative SEO, so the vast majority of webmasters don't need to worry about negative SEO at all.
A new tool to disavow links | Google Search Central Blog
Note that they advise caution even if you are on the receiving end of a negative SEO attack, let alone receiving targeted backlinks which it doesn't seem is the case, let alone your case where your site is subject only to internet background noise, as it seems from your question.
It could possibly hurt
If you accidentally disavow even one good backlink from a .pw
or .in
domain, say from a Palauan or Indian blogger with high domain authority, losing that single backlink is likely to hurt you more than disavowing all the other spammy links combined, because Google is so adept at devaluing spam in the first place.
Conclusion
Google's ranking algorithm is like your immune system - it's highly trained to ignore all this unimportant background stuff to focus on deliberate black-hat link-building and other willful backlink issues. I don't believe you're giving it enough credit by discriminating against entire TLDs like this. If it were that easy to prevent spam, Google's engineers would have just blocked .in
and .pw
in their algorithm.
Furthermore, I believe the notion that treating the entire .in
and .pw
TLDs differently than you do with other domains would give you an SEO boost is a bit naive. If this strategy were good at giving your site a competitive SEO edge, it would be shared in SEO circles and Google would put special effort into tweaking their algorithm to reduce this artificial competitive edge by webmasters who use the disavow tool, putting everyone at square one again of not needing to use the disavow tool.
In my opinion, discriminating against entire TLDs because you are afraid of a potential manual action based on backlink background noise is a complete non-starter. I highly recommend against it, as I strongly believe it cannot help your site.
.pw
orin
country codes?