A) Not possible, given the amount of time I've spent playing MMOs with zero folks ever on an ignore list (see post above for lowkey brag, not gonna repeat it again =P)
B) Yelling at someone for being hit by an AoE doesn't warrant a block, it warrants a polite request to not yell. Ditto 'kicking up a fuss about wipes in old content.'
My behavior doesn't perpetuate negativity, therefore negativity doesn't follow me around and happen everywhere. I also realize that humans aren't restricted to the care-bear happy-go-lucky type of behavior. When another human simply needs to vent for a minute, I won't put them on a block list for that reason. Someone would have to absolutely melt down with racial assaults, bigotry, unwarranted sexual talk, talk of illegal activities, etc., in order for me to block them.
Though I have seen that kind of talk, if it's not directed at me, then it warrants a report, not a block. What I consider 'reportable behavior' has never been directed at me, not in hundreds of thousands of interactions with other MMO players. Never, not once, since 1999. I ain't a magician or anything, so how have I avoided it? I dunno, you tell me.
We should all deal with these things (complaining about AoE damage or mechanics failures), try to put a positive angle on the interactions, and if that fails, move on. Humans will be humans and will use language humans do. I cannot and will not manipulate the environment so I can trick myself into thinking these things don't exist.