The outside ledge area highlighted in red. The only way to access it is from the small area highlighted in blue. As long as people are camping near the only way up and knocking the zombies off that roof before they can jump, there are no other ways to get up there. I had a few players test out jumping from the roof of the garage to see if doublestacking then jumping would work, but the map ceiling is too low so it prevents you from making it anywhere near the ledge. I know we've all seen people die up there before, but that only ever happens when people stick their feet over the side and get tagged from below like any other ledge spot. Unfortunately, the ledge is more than wide enough to fit people without needing to go near the side. If there is no other way up to the ledge, and you think the spot should stay legal, then please post why you feel that way. If there is another way up to the ledge, then you are more than welcome to point it out.