The only time I truely raged was when a sapper on our team built Earthworks and stuff around the only door out of the flag area in our fort. It was awful to sit up there, hearing the screams of our comorades being bayonetted, shot, or blown up, and knowing there was almost nothing we could do. (couldn't shoot, because everyone was in melee) On top of that, If we tried to remove any of the fortifications, the noob would tk us.
I also hate it when I'm playing as a sapper, and 10 campers in a house say,"Plz, can u fortify r house?" I begin building a earthwork (not in the way so it's immposible to get in) while they all hide in the back room, giving me no cover what so ever. Naturally, I get shot or bayonetted half way through by an enemy, and then listen to all the campers call me a noob because I only built half an earthwork.