That is a mis-statement. I have more opinions available to me after Markbrown unignored me, but smallfil still has me on ignore. I read everything I can, and decide what to listen to or not. At least I have a choice when I am not ignored, to read the opines of those folks.
Perhaps, but at least without being ignored, I have the CHOICE to decide for myself which opines are "destructive" or not. Having a choice is always better than not having a choice. It really sux when people get into a spat that runs deep enough that one of the parties involved in the spat has to take the drastic step of ignoring another. Who is the loser in that case? The "ignorer", or the "ignoree"? I say, they both lose. And that is my opinion. Think about it, and listen to above-referenced soundtrack while thinking.
Reading a person's posts that one does not agree with does not make one's IQ drop. Oy! Here's a perfect example!
Same with tennis, if you are A and play with someone who is a C, your game suffers badly. They literally pull your game straight to hell. If they are Open level, you pull their game down because they’re not expecting much from you. Trading with idiots has costed me a lot, wobbly or crazy hands are contagious
Let me ask you this, do you feel that interacting with people who are smarter than you in a particular field or area increases your intelligence, gives you inspiration, triggers new ideas, and in general has a positive effect on you? That's certainly what happens for me. Why wouldn't the opposite also be true when interacting with trolls or those on the left side of the Dunning Kruger curve?