I think this qualifies as a ledge spot. You can't stack due to the antistacking script, and its accessible only via those two smaller objects you have to longjump/strafejump to.
You can strafe jump far enough to knife the people standing there if you do it right. Its really pretty easy to get to if zombies don't try to mass at it.
I'm fairly new to regular zombiemods, so I am just curious, what makes this spot worse than say, the tanks outside with the single ladder going all the way up? Both cases zombies can only go one at a time and as soon as they are in sight of humans they can be shot off very fast.
Yea, I have to agree with Sam. I've been there several times and have been swiped by a zombie, as well as swiping humans that were there. With the increase in their speed, zombies don't even need to jump on one of the two heater things in order to get the humans, all they need is just a strafe and a knife toward where the human(s) are. I was also kicked just now by Waffles for being there, but it hasn't been officially posted as an 'illegal spot'. There was no post in the illegal spots thread, and nothing to say it is illegal in the !illegal menu. :3