Maybe the question is - how many people would want to?
From the comments here I would say the mmo environment has changed from those days in WoW. Harsher behaviour seen wrongly as being more hardcore maybe.
Raids in the past where equally, if not more, daunting than some of today's. Yet overall, seemed to be approached with a more social mindset.
You'd always get the occasional jerk, but these guys soon realized acting that way wouldn't get you invites to the guild raid no matter how good you where.
That's not to say there aren't great people around now, of course there are. But maybe a smaller ratio of the player base than from years back.