Hello, @Grenko, what really happened was that he just kicked you, but still this type of behaviour is not acceptable, so we're sorry you had to go through this. The admin will be warned, if anything like that happens again just reach out to us and we'll fix it as soon as possible!
About the classes, you can use all of em, some of those classes are just hated by others that's all.
I hope I've answered all of your questions, if not reply here and we can disscuss them .
Have fun and have a nice day!