I will say that I do feel horrible for people who need to pug. Our healers are proven raiders - Muru, Yogg, Heroic LK completed in their prime, yet a couple of them were removed from groups for stopping to drink. I don't think there is anything that can be done about it - the community's ignorance will take time to correct. On the other hand I love that this makes guilds relevant again. It was a nightmare trying to keep a guild going when no one needed to be in one. Sooner or later though the scarcity of healers in random pugs will force people to be more understanding.
I do still have concerns about the class balance between healers (and PVP) - but that is for another post on another day. Just keep chugging away at it guys, the community will soon realize they need you way more than you need them.