Soldato
Oh I had this happen to me on that map last night too, I wondered what was going on.
I expect there's a few more, but that seems to be the most popular one now - people can actually lay down inside a rock, and have a decent view of the whole trenches area, and also the other side by the sea wall cannons. It's bloody stupid, as you can't shoot or grenade them - so have to just stay away from the area; or leave the game. Mind you, that doesn't work, as the next rotation to that map, sees a new bunch of idiots go up there.
Reported a few for 'cheating' but you just know that nothing will be done - and much as I want the Thompson SMG, I'm not jumping on this bandwagon myself.