I can not tell you how many threads I have seen due to peopling thinking the dungeon finder is the reason people are acting so nasty. Think to yourself, how is something that makes the game a bit easier going to affect the people using it? There is no way this could happen, there is no trickery or forcefulness of this tool, it's to help you find groups a bit faster than spamming Stormwind or Org looking for a group.
You have a choice of whether to use this tool, it is just like life, you can go to the grocery store and deal with the stupid, ignorant people you may find and get back to your business, or you can buy them online, where it might be easier, but you're missing out on a lot. Terrible analogy? Yes. Makes sense? I sure hope so.
Anywhere you go, you will find these people, nothing is going to be perfect. There is always going to be nasty, mean people. You just need to remember that there are nice people out there too, willing to give you a hand and enjoy what's going on. You wouldn't blame your car for breaking when someone else beat it up, would you? Same thing goes with the dungeon finder, Blizzard implanted this feature to make things easier and more enjoyable for players. From what I've seen, the dungeon finder attracts these mean people like moths to flames because it's not often you find someone in your own realm, and it is very easy to get away with. The worst that could happen is getting kicked, and they know it. It's like a child screaming, if the child can get away with it the first time, he/she is bound to do it again. If the adult catches it before it becomes a problem, then the child is likely to think twice before screaming. Unfortunately, we can not punish these people and attempt to help them. We do have the power of tickets, kicks and so on though. Yes, kick system isn't top notch at the moment, but here are some things that might help you get through these people.
1: Remain calm, the more you rage and yell, the more they're going to bully, hurt and so on, and less of a chance they will leave.
2: If racist, sexist remarks come up, don't be afraid to open a ticket and talk to Blizzard about the problem. There is a chance this person could be banned.
3: Don't bully back. No matter how angry you are, being a jerk back may get not only the person that was originally in trouble, it may also get you in trouble.
4: Don't blame the entire dungeon finder system. It's not the tools fault, it's the people.
If you do all of these things already, great! There are some people who don't, and I highly recommend using them. It can not only make you feel a bit better about the system, but it can help get rid or even better, help these "meanies" and "jerkfaces".
Don't bother to post if you have nothing good to say about this thread.