That's the real problem, and the reason why those sort of threads are created.
People don't pay attention to who they are playing with, like in any other online game, nothing new.
When running roulette dungeons it is usual to run into people geared enough or largely overgeared making tanking wall to wall and aggressive healer dps easy.
Then for many that habit becomes the norm - things go wrong when you meet a less seasonned/prepared player.
This is especially true for later leveling dungeons - it can become pretty hard to heal or tank the lvl 79/89 dungeons when they still only wear the 400/530 tomestone gear set.
Even pulling wall to wall an expert roulette dungeon could prove challenging for a new tank/healer pair that just met the required min ilvl.
I don't often meet those new players though, so when I do I usually just take a breath and slow down...
