It's not that you can actually get dumber by reading something.
Sometimes it feels that way though...
I had two people on my ignore list for a time, but I since emptied the list. It's not like you can't see what they say when people quote them anyway. I try to ignore the idiocy but it's more convenient if you never have to be exposed to it in the first place. Mostly I try to get along with everyone now.
Certain people will say things that will make gy head spin but that's just the internet; it's unlikely that they are the same in real life.
“The greatness of a nation and its moral progress can be judged by the way its animals are treated.”
- Mahatma Gandhi