For those reddit NEETs that ignored my advice to use old.reddit with the Reddit Enhancement Extension added on, one of the things RES (Reddit Enhancement Suite) lets you do is make custom tags for each user. See pic related.
You just click that little tag icon and you can write any text there you want which shows next to that users name on all their comments across all subreddits. It really helps keep track of these bastards. If someone mentions they are Indian or "trans" you just write that on their tag and then when you see them again you will know why they are such a piece of shit without having to go through their history.