>ignore their posts
It's generally the best thing to do, but u will always get the village idiot that thinks kicking up a fuss and fighting fire with fire is the right solution, so it never truly works

>always be as passive aggressive to them as possible, and do as much as you can to make their experience on this site miserable
No. Heyuri is the way it is precisely because it has always rejected that kind of behavior, and those who try to initiate it. That method only ever succeeds in transforming healthy communities into hostile battlefields of bitterness - where every user views all the other users as unwelcome intruders - like all the other places that thought "let's be unbearable assholes and drive away the users we don't like!" would make for a good community

The best alternative to ignoring things is to turn them into something fun and/or creative instead - the more users that choose this path, the better things will be