What's the point? AV limit is 40, PVE raids are 25, old school PVE raids are 40. I could understand 5x5 for a full raid, but why 5x25? World pvp? Maybe, in a city the guards and lag would be huge so much that the numbers would be more of a hindrance if anything.

And of course it is possible...how is it not possible? They would all have to stay outside though.