Perhaps if all arenas were set up like Omni 1.....
When entering mayhem suppression area's, the server wouldnt initiate the crossing if you were buffed.
Then lengthen the amount of time for the grace period, a great deal, for allowing buffs to take place.
Not only would this decrease the amount of outside buffing, but would allow for less run-in-and-kill's and would create less tension in the arena for new pvp peeps, more control, less ganking of unwilling duelers, and so on and so on.
Is this completely a stupid idea?