I know this feeling with PuGs.... though thankfully it doesn't happen that often and with text I can just press UP on the directional pad ::)
(http://art.penny-arcade.com/photos/i-gFwBMNM/0/1050x10000/i-gFwBMNM-1050x10000.jpg)
Here is what I imagine some PuG DPS hears, when given these instructions:
"Qwpek lapojf pokwds pj jfka lhljk jhl jadh bhabkhjb. Gjdflkj a kjnbashb jdfkjblkjb DPS, you need to burn these kl lkdz fljkn. Ba hjkbdl okfdk lkg askjhgl an lkjsjd ijrg ijgl qiouywe."
I admit to not really coming across TOO many really horrible pugs groups, but then again I haven't done anything except the first two adventures and the first two dungeons. By that I mean the ones that just sit there and b!tch and argue about whose fault is what. Most groups seem to pick themselves back up, say "What did we do? Let's not do that again..." and move on. I think I only came across some real a-hats in beta.