This question already has an answer here:
For example - comments. I mean, REALLY ignore. How can I do this?
The problem is that lots of people submit spammy comments, like:
Hi cool article, visit example.com
Then I get emails from the webmaster of
example.com telling me to remove the comment because Google penalized his site because of "unnatural links"
I have captcha, also the system is set up to ignore comments with 3 or more links, but spam still goes through :(
Can I make Google ignore comments completely, and not use them to rank sites and stuff?