Yes. Especially in LFR.
Had this funny situation last night. 3 healers, me and my girlfriend both on our healer chars. Heart of unliving drops, and a guy starts up this convo
Angry Kid: Do you need that?
GF: Yes, thats why i rolled on it
Angry Kid: lol no need to be rude
GF: O_o
Angry Kid: Dude tell your friend to not be so rude
Me: Hah its just a trinket don't be so entitled
Angry Kid: You two are such retards, reported for being rude
Me: what?
Angry kid is ignoring you.
Pretty sad that people inheirently feel entitled to items, especially while performing poorly. To put it into perspective, i did a flat 25k HPS most of the raid. My GF in pvp gear, did 20k and was second on healing. 3-4 healers down, is our Angry Kid friend. In full 384 LFR gear, vastly out gearing my girlfriend by FAR, doing 8k HPS.