Here is my worthless opinion: Yes, players who exploit glitches in multiplayer are douchebags. If you are the one responsible for the glitch that is being exploited, however, you don't get to blame the exploiters for your own cock-ups.
Fix the bugs, suspend the exploiters and strip their ill-gotten rewards, and commit your company to continue fixing, suspending, stripping away, and banning for repeat offenders... but don't try to blame the exploiters for the bugs in your game. That kinda makes you a douchebag, too.