I do not have the time nor wish to spend the effort to do this but I think the best way to get back at really stupid fandom discourse or annoying reblogs would be to create one of those "yourfave" blogs with something that's not inherently problematic but is broadly unpopular on Tumblr (eg: golfing; liking the Beatles; and similar behaviors) and then just repeatedly making posts with that person's favorite characters. Have all questions and submissions off on the blog. do not respond to any criticism in any way other than to check the blog of the person bothering you and then make a post saying their fave golfs. Do not think about whether this is an accurate assessment of their fave; that is not the point. The point is to see if they fall for the most obvious, idiotic bait.