also, capture the "hack" on video (e.g. fraps), that way folks who do know the class mechanics inside out can review it.
As for the person accused of hacking who wasn't (PT and marauder), ***? Doesn't bioware have server side logs they can review? How can they get this wrong? What the heck is their procedure for validating a claim of hacking.
Good luck with that. Everyone cheats all the time, except when someone else is recording them. Then all of a sudden, they somehow know they are being observed and behave normal. Quantum cheaing.