Mr Bigwinky

Remove it. 99.5% used to grief people. 0.49% put up in the middle of nowhere because you want rid of it. 0.01% used to protect a camp etc.

Here's hoping that OP stays banned server-side and that his friend also gains a server ban for openly supporting cheating (Crakka) and being abusive / offensive as can be seen in his forum posts here. Oh, and if possible also ban the guys who asked to be teleported / parachuted etc. if you find any evidence of it other than the confession of the OP.

I don't think anyone has mentioned yet that quick Alt+F4 is currently your only saviour from some hackers, like when everyone on the server starts dying or you get teleported somewhere. If you are left in game for 5 seconds after logging from such an event, you'll probably be killed. I don't know what to do about it, but I think it is important enough a fact to think about.