What about this:
Reports need:
-SERVER
-Time/Date
-GPS Coordinates (Press F3 to see x y z, and CTRL+F3 so you don't have the graph)
-Who and Whom was involved (The causer and witnesses, don't say the whole server, that's stupid)
-What they were doing (Specifics would help)
-PROOF
Proof: Video or screenshots. Use fraps (There's a 30 second free trial) for videos and minecraft has its own screenshot function (F2). The proof needs to be plausible and clear, and if not explained. Post on an imaging website (imgur.com) and for videos place on youtube or mediafire (Do not put viruses)