I disguise my British accent with a Texan one when I want to shout at prepubescant misfits, but that's only because it works so damn well. Really. Give it a try guys.
But yeah, I can see what you mean. I hate British gamers; they make me feel bad about my country. Maybe we can track them down via Xbox Live and destroy them.
On Xbox Live, there is a disturbing trend among different countries. The main people I see online are either British, American or German.
The majority of the British are rude, almost incomprehensible due to no real schooling in the English language whatsoever, and prone to jokes concerning your heritage.
All of the racists I've ever seen online are sadly American, proudly lauding a large stereotype to the international community. I mean really, it's skin. Rip it off and you'll always get a gross mess of flesh and organs underneath, why can't anyone understand that? Americans also call everyone "fag" a lot, which we Brits just don't get because that means you are calling us all cigarettes.
The majority of Germans are incredibly good at the game they're playing, and annoyingly trounce anyone they're against.
If you think I'm stereotyping, just play online for a few hours, and you really will be surprised at how much I got correct.