It's not a case of rights, they'll do it out of anonymity. If it bothers the OP so much he should find a new room though.. no sense in wondering why people do things. If you don't understand why TC off is better than TC 1.. you may want do laps on both settings until you figure it out. I think the people in question were trying to invoke constructive criticism in the only way they knew how.. through mockery. You'd be surprised at the number of people who don't know how to try to help people through actual descriptive meaningful conversation - or who don't care to. Think about it.. by trying to get him to use TC off they simply are just encouraging him to be more of a competition. Who would try to hinder someone by helping them? It's like saying "Hey you know you can do this in another way where you benefit more you retard". Sure, the "You retard" comment did not need to be added.. however if you took the advice the person was trying to convey you may actually get farther than if you didn't.
I also dislike people, for the record, that use really ignorant words so long as they really aren't deserved.. like having having TC 1 is still not like having TC 6 or something.. I could see if you had a large amount it may be called for and they have even told you that you'd be better off with 1, but to use 1 and they say something like that doesn't make much sense... It may be because they themselves have been called the very same thing for being bad at something else irrelevant and they wanted to use it against someone and your "TC 1" happened to piss them off. *shrug* I'm no psychologist though.. Some people are just mouthy >.>