1. It is extremely spawn biasd
So is a map like Vilnius.
2. The map encourages oicw/nade spam.
So does a map like Traning.
I don't think a map should be removed for these reasons unfortunatly. I don't like these aspects of these maps either but I'm afraid they will probabaly have to stay. The only thing that would get Prison Night removed is it's vast abundance of glitches and also the fact that it's already banned from the ladder and therefore has no point in being in the map pack except for public games.