I don't pug as much as I used to, mostly due to time constraints (I don't have time to run instances with my friends, let alone randoms), but I did do a couple recently as a healer. I cannot believe what some people think passes as decent tanking gear. It's great when you struggle to heal a tank and then inspect them to see a fair amount of level 70 gear (bonus points if it's not even epic), plus a healthy (or not) dose of dps gear, I think I must have missed the memo about crit being good for tanking...

And this is before you get to the inability to hold agro on more than one mob at a time.

There was one 'character' on my server who used to (try to) organise pug raids fairly regularly at level 70 (he was often shouting in trade about instances), not sure what happened to him, but I did join one of his pugs and it was definately an experience. Along with all the caps lock and no clue how to play his class (or any other for that matter), he was adamant that the group should be set-up in a specific way. This way had the healers in the same group as the tank and the melee dps + hunter in a group with the spell casters - what a fantastic way to get people the buffs they need for the job (before the whole raid-wide/buff stacking came in). What's worse is he didn't even put himself in a beneficial group for his class.

Additionally I love it when people try and get an overlevelled group for certain instance (LF more Kara - 75+!), particularly when the person advertising is below the level they are looking for