Yes you can play games online without getting bricked... to my knowledge I don't even think you can get bricked from "playing" games.
just don't cheat online and you should be fine (as far as banning goes)
you won't brick by playing games as the above user said
i play alot of backups online and havent had any trouble yet (mario kart, cod etc)
but for the love of god plz dont aply cheats because that just screws the game for everyone!
User asked a question that can be answered by searching. Other than that, he received two clear answers. Furthurmore, went on iRC and asked in two channels.
Think he has his answer. Thread locked.