As a support gunner set up in a good position, other people stacking up right next to each other in a tight space. Seriously, all you're doing is just making it easier for the other team to big you off in bigger groups. You don't have to be alone but try and split off in pairs so you're not easy pickings. I've seen the same issue when laying down fire on a spot, I've got them covered, the best opportunity to push forward would be now but nope, I'm having to push up by myself hoping hipfire will keep some heads down. It's pretty fun though, so I can't complain too much.
On that note, I was sat at the back corner of a foxhole (was currently between support weapons at that point so was using my reliable E&L AK) with a good view of either side, we were doing really well in holding the base when I noticed some guy at the far right getting too close for comfort, but I couldn't do anything as I'd only seen him through a thin gap in the wall. Anyway, mentioned it to the defenders on the right and go back to keeping on my post. Five minutes later, I feel a tap on my shoulder. "Knife kill." What did I say, folks?