Not too long ago network tweaking was observed in duels: http://forums.ubi.com/showthread.php...eserve-to-die-!
Even less long ago a wave of strange connection errors and subsequent game issueswere reported by yours truly: http://forums.ubi.com/showthread.php...the-disconnect
Also, unlock tech (and possibly a whole heap of trouble along with it) will disappear with the next patch. I suspect that it is the exploiters trying to squeeze out as much XP as they can from this XP weekend and their last days of using these particular exploits so they can take the hit later when they'll have to actually play the game.