Originally Posted by nakman
Well giving an ID every once in a while doesn't mean you can't still use first names and CB handles. Nothing wrong with shouting "dude don't back up anymore, you're about to go in a hole!" on the ham, you can make good with the FCC later, as you know. But for those other times, that's why we do the vanity calls, eh.
The only FCC restrictions on what you cannot say on ham are profanity, conduct full time business or use coded-for-obscurity messages. The rest is just convention within the hobby, like the way those early guys did things (73's, Old Man, Q-codes, etc.) or informal or courteous operating habits (like saying the call signs of others in a net).