I've found, to my own disappointment, that I'm getting less and less tolerant of PUGs. Instead of explaining carefully and patiently how dps blowing explosive barrels is a bad thing because of the threat generated, I just don't heal them and let them pick up a repair bill instead.
If I see Kaon come up and I don't need it for the Rakghoul weekly, I'm highly likely to bail if I see dps in less than full columi.
If I'm tanking and the dps face pull, I'm more likely to let them die and find a spot to wait for the adds than charge back and taunt.
And seriously, what's with all the 14k scrappers?