i have encountered no real problems in my PUGs. yet from reading this forum you would think that the entirety of all PUG population is made up of total N00bs.
i think that this is undeserved.
i have met a few warriors who do not listen but they are always only come one at a time, i can survive without them. i have been i groups of people who are willing to spend 15mins whilst i outline the 'how not to die' rules in UW and FoW and Thunderhead and Aurora Glade.
People only remember their bad experiences. People only post their bad experiences. Its not much of a post to say; today i played with an OK PUG.
the secret to playing with PUGs is patience. they do not know you, you must explain things fully because they do not know your play style.
i'm sure people have had good experiences with PUGs and i would like to hear them. as i'm sure everyone does.
Some groups gel some don't. but a good player can still play in a group that they don't get on with. don't take offence, don't give offence. only make jokes about Koreans

one of mine was when i did all of the Kryta missions with the same group. no fails. no deaths. no sticky moments.
we simply gel'd. all are now on my friends list.
(and yes, PUGs are good for expanding your friends list. not your ignore list. my ignore list has none.)
just give people a chance eh?