I found a nice practice on websites to deal with users who take advantage of AdBlock's software - here is an article on it (have a look at the image of the cat).
I think this should be obvious now...
Problem to solve:
I have an ad container on my site and I will place in this container a short note about "whitelist my site", with the following options:
Use normal, formatted/plain text.
Use an image in the background.
If user has AdBlock, the ad won't appear and my hidden text will appear for them.
According to this AdSense support document:
Publishers may not ask others to click their ads or use deceptive implementation methods to obtain clicks. This includes, but is not limited to, offering compensation to users for viewing ads or performing searches, promising to raise money for third parties for such behaviour or placing images next to individual ads.
In theory what I'm planning is some kind of encouragement for clicking ads.
Will I be violating Google AdSense's terms if I implement a text only and/or image only "whitelist us" message? Might I have problems with this type of violation?