I tried to remain as concealed as possible. Most events I'll try to find a vantage point like a place up high where I can stay crowd and just snipe at enemies. If I don't have that vantage point and I'm on the ground with everyone then I think I'm going to be seeing anyways.
It's a fight gets kind of crazy and I feel like I should be going from one place to another then of course I don't mind being seen I'll run back and forth to help with the help is needed but I generally try to stick to one good spot and stay hidden.