Ah, DPS who think that their only job is to DPS as much as they can, regardless of who they're with or what is going on.

How many of you wipe to ifrit or levi ex cause you won't hold DPS on the boss when adds are coming since you have to have the biggest numbers possuble? How many of you cause wipes in dungeons because you have a newer tank with a much weaker weapon than you and won't tone things down?
I don't call you good DPS, or even ok. Your bad, maybe even terrible.
And I won't hesitate to let you die if you pull aggro off me (or the tank if I'm healing) while grouping mobs up during a big pull for aoe.

Learn your role; knowing when to hold shows you know the fight and who you're matched with and understand what being a good DPS means