I hate the headset myself, if you're playing with mates or a group of decent gamers that you know it's great, but your mates/clan usually only play the same one or two games. So 90% of the time, it's ten year olds saying "I killed you n****r, you're just a n****r, n****r n****r n****r". The only people on my friend list who actually use the mic regularly are my two young nephews and one mentally challenged person who only seems to play games for a "fight".
No. You can send a message but it's not in-game, it's like a little email that they have to pause the game to read.
You could send a message at the end of each game, if that's all you wanted to do.
With the 360 you set which "group" you want to be a part of, family, recreation, pro or underground. The kids are
supposed to be in the family group, but obviously, if you're a kid you don't want to be in the kids group (and the kids usually know more about the 360 than mum and dad). Recreation is probably the group with the least kids because they have no idea what "recreation" means. Underground has the most, I think.
If you don't mind a depressing scouse gamer then feel free to add me.