My 2 most recent projects are reworks of other people's MTLs, saying MTLs don't get proper translations isn't true, it is just less likely as most people are going to look at translations that haven't been touched that much I can agree with but it depends on the translator. Also some games will never get translated anyways so sometimes a machine translation is all that they get. That being said, I am not going to argue against people being mad at bad translations there are alot of legit reasons for being upset about it and I am sure it is discouraging as a fan to see a game you enjoy getting a raw deal.
The thing is though is that banning them or hiding them on this site does nothing except allow the general population to ignore them. If you really want to do something I would get mad at the guy making all the bad translations rather then the place hosting them. They all come from SVS Comics user stigmata. give him shit lol.