and not to sound like a total snob.. I've pulled aggro before. mostly because of bad tanks, BUT I have tried to squeeze off just a tiny bit extra damage at 85%+ on trash and ended up pulling aggro and I do what any GOOD mage does at that situation... run the mob back to the tank, switch targets to a low threat target, and watch my health in case the tank doesn't pull aggro back soon enough that I can IB or Invis as needed.
edit - lol.. on the official forums people are saying that it's ALWAYS DPS' fault for pulling aggro. "Lay off DPS if you're getting threat". That often the tank has too much going on and can't keep track of all aggro. First off, THAT'S THEIR FUCKING JOB! Second off, if I get off two casts and get to 50%, sure, I'll switch targets. If I get two more casts off on the new target and get to 50%, I'm probably fucking leaving party because I'm not going to take the time to target/assist the tank because he's too lazy to aggro anything beyond what he's auto-attacking. I'll be the first to admit (or agree) that I've had more good tanks than bad tanks so far.. but yeah... if a tank is running into a crowd and only single target aggroing, especially not on the nukes in the crowd, fuck that.
edit - lol.. on the official forums people are saying that it's ALWAYS DPS' fault for pulling aggro. "Lay off DPS if you're getting threat". That often the tank has too much going on and can't keep track of all aggro. First off, THAT'S THEIR FUCKING JOB! Second off, if I get off two casts and get to 50%, sure, I'll switch targets. If I get two more casts off on the new target and get to 50%, I'm probably fucking leaving party because I'm not going to take the time to target/assist the tank because he's too lazy to aggro anything beyond what he's auto-attacking. I'll be the first to admit (or agree) that I've had more good tanks than bad tanks so far.. but yeah... if a tank is running into a crowd and only single target aggroing, especially not on the nukes in the crowd, fuck that.