Sysadmin

there was an entire genre of posts where posters would say "ask me any question and then edit your comment to make me look bad"

there were also times i'd call out a racist and they'd edit their comment to make it look like i'd called out as racist someone who was saying something totally innocuous. but then i was usually not the only one doing it, and the comments in questions usually got downvoted to oblivion, not to mention the time-of-edit indicators, so anybody with half a brain cell could figure out exactly what had happened.