Yea, there have been lots of times other people have won gear I wanted, especially on this toon because it seemed like there was always a druid in the party or something. I don't get mad about it...I just keep going.
Honestly, I've never wiped my group on purpose, and I'm pretty patient with obviously new tanks. I don't even think I have any stories about fighting with my party. I'm a really easy going person, and I usually just let that stuff slide because its not even worth getting mad about.
I have only deliberately let a group wipe once, and it was back in BC and not over gear. It was a tank who was letting my face get punched in and refusing to use Ret aura or Consecrate.
I paid the repair bills of the other 3 people.