I was a bit confused reading this one since there are now two suggestions with the same title.
For this one, it's a -1 for me. How can alts abuse GVG? Most people just bring FCPers as alts anyway, so I don't see the problem with that. Also, this will not just affect alts, it will affect people who play on the same connection together.
These guys who were replying(Fatal. and Hollister) have been waiting for people to fight them in GVG. Being a keyboard warrior in the forums and not backing it up in game says a lot more than what you typed.