I run a Spigot protocol hack PvP Network, as most of our users still use 1.7.X we don't want to update to 1.8 in the near future. At the time, we are experiencing a big problem, someone has a modified client with which he can crash the server using the NBT Tag exploit, that was fixed in 1.8.4 (or a 1.8.X version). He crashes all the servers everytime I get them back up, and if I am not there, the servers stop responding and don't autorestart. I wanted to ask you guys you found out if there is any way to fix that, and if there is how can I do it? I though I could edit the spigot.jar source code, but I can't find the protocol hack source code, if someone knows where I can find it, I would appreciated as well. Thanks everyone in advance.