You can stand under the stairs and shoot out without the enemies being able to get to you, as long as you stand in the right spot. I think that's kinda cheesy - not that I have a problem with that. It also seems like some people have a different definition of "cheese". To me, a cheese is not necessarily a glitch, just something that allows players to avoid the intended challenge/difficulty. Under the stairs is the only place I know of on that map where you can hide and be completely safe (people have mentioned on top of a light, that I've never heard of before). You can take cover behind other boxes and barriers and stuff, but you're still exposed and at risk, so I don't consider that cheesy.