He is back again and make sure you keep an eye on him every single time. And make sure you comment on his profile by giving him a warning to not bother other people again or he will be banned for good.
Because one of the reasons why they do it is because they want to see people get upset by what they're doing. It makes them feel good to see people get riled up, kind of like the way a bully feels good by hurting other people.
Don't bother leaving "why are you doing this" or "stop" messages for vandals like this. They know what they're doing and they're doing it deliberately. When people react the way you did, it tells them they've got an audience. They come back and commit more vandalism so they can keep watching you get upset and can keep feeling good about you being upset.
The best thing to do is to fix what you can and not respond to any taunts. Just remember, "They're doing it to make me mad so they can feel good." If you need to request help, file a report on the VSTF Wiki. That's a better place than leaving messages for Fandom employees.
I know but, it's true that these idiots should learn to respect opinions or just ignore the Mighty355 wiki and move on instead of harassing, making up stupid lies and being hypocritical(such as claiming they are not racist while in reality they really are racist), shoving things down people's throats and ruining the wiki. They even claim that Mighty355 is a pedophille, which he really isn't only because he likes characters wearing diapers.
People are allowed to like what they want and opinions are opinions.