Now, I want to put this up front: I realize that a LOT of people are about to send me some nasty letters for saying this. I also realize that it's nearly impossible (because this IS the internet) for this to go on for long without a flame war, but it needs to be discussed. Also, bear in mind that my opinion does not mean I expect others to think remotely my way. That's the whole point of it being a discussion.
Now, in MY opinion, Multiplayer/PvP hurts gaming, badly. The main reason that we have hacks, raging, noob exploits, glitching, e-peens, douchebags, screaming kids, yearly clones, bad publicity, etc. is because of multiplayer. In FPS games, multiplayer serves as little more than a glorfied "my ego is bigger than yours" frag-fest where skill isn't the deciding factor, glitches and cheap tactics are. RPGs have that AND the classes are constantly nerfed or boosted to balance PvP while ignoring PvE, which one would think is the core of a good RPG. I feel that honestly (raising my flame shield here) if games like Halo, Call of Duty, World of Warcraft, and other big titles like them, were focused more on co-operative gaming, or simply did not have multiplayer, there wouldn't be such a big issue with rage and hackers, meaning a drop in all the problems that plague the industry today, even pirating. I have yet to personally find a multiplayer/PvP oriented game that I enjoyed due to the aforementioned problems, and really have yet to find what these multiplayer based games have done to contribute positively to the industry as a whole. Maybe if we didn't have these problems, gaming wouldn't have such a hard time being accepted? Maybe the industry would be forced to be more innovative, instead of the new setting, same engine system we get (looking at you CoD).
Now, that's MY opinion, so the discussion is open for intelligent minds. (note: I don't expect anyone to think like me, and I don't believe my opinion is the "right one" I'm just giving my opinion to start the discussion)