Yes they should.
No they should not.
No opinion/Depends on circumstances/kind of shouting
No matter what the forum members say it is up to you.
If it is unacceptable to you, then you need to find a better place to have fun.
Personally, I zone out from time to time on progression and the occasional "Hey, Fuckface pull your head out of your ass." is what I need to refresh my keybind pounding! However, I went into my guild with that knowledge and do not get upset when it happens.
Also, even if the OP really wiped them ( which he himself doubts ) and we considered that kind of an act "shit" then the raid leader has to grow up so he can take shit like this. Shit happens.Sometimes you can misclick, sometimes you can panic, sometimes you can get some nasty lag or a huge fps loss. Even if you know a fight perfectly, your performance during multiple attempts at that fight will never be the same. Because we are humans. We are not robots that do everything the exact same way every time.
Also, if you go to a raid, you should be mentally prepared to wipe many times even if it gets to the point where it's no longer fun otherwise... YOU ARE NOT PREPARED!
I was the raid leader for my guild for all of Cataclysm (cleared all content on normal - we're very casual) and the beginning of Mists (before I burned out) and I would NEVER yell at my team. I would yell and cuss and get angry, and then I would push my talk button for Vent and calmly point out any errors from the last wipe and what should be done to correct them. I only recently told our guild leader about that. We really only had one guy that I could have yelled at, but he was an alcoholic who played so drunk that he screwed up too much. Funny thing, after he was told he'd be kicked from the guild if he played drunk in a raid again he quit drinking and it turns out that sober he's a freak'n great player.
If a fat kid falls in the forrest and no one is around do the trees laugh?You're an insignificant speck of a person sitting on an insignificant speck of a world orbiting an insignificant speck of a star in an insignificant speck of a galaxy. Literally, no one cares what you think.
Pretty much boils down to whether it is a guild/pre-organized group, or a PuG, In an organized group/guild it is totally acceptable, i've done it and so how many other people, it works. I my guild this happens like once a month at the most, and is literally only 1 outburst, and then people usually shape-up or are replaced.
In a PuG however, it is totally not acceptable. I have never reacted angrily to the failure of a PuG, doing so is just silly, and is bad-form, a PuG should be fairly relaxed and everyone should understand that we may or may not complete what we set out to accomplish. After some continuous wipes in pugs on things I've killed already, whether it be old content or current-tier I just let the raid know that we have X more pulls before I will step out, and they can continue without me or not. A PuG should never end up in shouting, because you can always step out, by definition there is no lasting commitment in a PuG, so you can't expect perfection, and you shouldn't stay if you are unhappy with the performance of the group. If 1 person is the problem, they can always be replaced, but it needs to be done with a calm and collected attitude.