While I agree, I also don't think it's too much to ask of an opposing fan to be aware of their surroundings. When I go to away (or neutral field for VT) games, I make it a point to start out on a good note. I usually chat before the game, say I hope/expect it's a good game but I hope they're okay with some banter. That usually helps me gauge what I can get away with and also keeps things more on the playful side.