Is there a way where we can make a nobuild zone on the top of trade_festive_park? Engineers are allowed to build using the resize glitch, and they can get on the top of the map. With this, they can build their buildings on the top of the map and spawncamp the other team. Here's a demo showing you that people can shoot through the map, how people get to there, and that Engineers can build on top of it.
http://www.mediafire.com/?m0ip1hu6m2fl1o1 . (Note: If it lags, that's not you, but the demo itself. I lagged near the end, so that's probably what caused it.)