I've run into this situation a lot recently as I've been leveling rogue-now-ninja. A little background, I main tank jobs (WAR/DRK at 60) but I have a DRG at 60 as well so I know how to tank, dps, etc.
I've been meticulous about making HQ gear for myself as I level. I've been using B4B, raging strikes, internal release for cross class skills. And in low level dungeons even though I'm not playing my 50+ jobs I've still been ripping hate from the tanks.
Politely asking them to pull with shield lob and use flash more hasn't worked. There were Toto-Rok runs where I was afraid to use B4B because I knew I'd be tanking. I'd have hate on one, the healer would have another, and the tank would ONLY have the one he was targeting.
So it's not just 50+ dps. If you are better geared than your tank and you know what you are doing (and he doesn't)...you're gonna carry that load.
Or warn that tank and if he doesn't improve, kick him. It's the only way they'll learn they doin' it wrong.
