2. Don't insult, cuss or abuse other players.
3. Be considerate to all players.
Camping? It depends on what game mode you're playing.
On LMS - cowardly. Thankfully anti-camping is enabled in almost all LMS servers.
CTF and TDM - it's annoying some times but with team play, it's strategy. Besides, they're not invincible and they're sitting ducks -> easy targets.
DM + Minstagib - campers don't win

Typefragging - as -z- said, it's conditional. If i see a flag carrier typing, of course I'm going to frag em. You shouldn't be leaving yourself open as a target if you're a FC.
And just play nice, there's no need to play dirty.