I generally don't have a problem with them unless there are 3+ engies in one place with them. Then again, I don't really like engie camps in general. I think it's annoying and a really shitty strategy, especially on CTF maps. You keep losing, even though you have 4 or more engies, why? Because no one is actually protecting the intel. All I need is a chunk of my team to go engage you, and I can pretty much walk into your intel room and cap it. It's quite funny when they wonder why. "But we haz 5 engies..." ha.