I largely want to talk about the vocal criticism given during raids on skype/mumble/whatever. I haven't raided in a long while now so I don't know how guilds operate now, but back in BC/Wrath I saw a lot of disrespectful behavior toward mistakes from raiders during encounters. For example, one guild I joined the raid leader just put everyone in general on blast when wiping, calling them complete idiots and to shape up and stop being worthless, in addition to explaining the encounters. I've seen people call out others for standing in the fire and directly insult them, or sometimes just yell at them like they are a child.
My questions are, how much is too much? When do you put your foot down and feel like telling the person in question to piss off? What kind of criticism are you receptive to? What kind do you hate?
Bonus question: What do you think when guilds advertise requiring "thick skin"? Is it bullshit so they can walk all over you? Or a legit requirement?