Jetpacks inside.

[anubis_wing]

It makes it incredibly difficult to take a base with 15 people hiding inside of it blasting bombs, bullets and other objects at you with accuracy so bad that you'll get hit because it's so confusing; and if the bullets don't kill you, the fact that the lag is so awful because of so many bullet shells flying at the door.
I think Jetpacks should be enabled for it would make it so you could check what's in the base before getting raped by several hundred people at once.