It would be a privacy nightmare, but if everyone was forced to sign up under there real name with robust identity verification you'd get a much less toxic community.
When someone asks about something people do not even upvote, thank or write a comment thanking the participating people. The single most important counter is missing: the reciprocal counter. If you post a question and do not participate, just read the answers, then you should pay the price and this must be shown. Also, bots are not filtered at all...
It's a cesspool. The sooner this mudpit gets drained, the better.