I don't get how fun runs=fail.
We do drunken raid runs every week. We do fail here and there but it's not very often. I can promise you that we have fun in the process too. Everything you said that wasn't cool happens on our runs. Goofing on each other, talking smack, making fun of someone who dies. In fact when someone does die not only do we make fun of them, we laugh at them and make them do a shot. We most certainly have fun while raiding and rarely do we fail, but when we do BFD. We laugh at ourselves and rerun it. Let's be honest how much time does it really take to rerun a raid?
So I'd say the very opposite. Fun runs=success and laughter at the same time. This is after all a game and if you need certain pixels (aka gear) on your account to feel worthy you might need to rethink things. Here's a thought. We already smoke this epic stuff with the gear we have now. So chasing a pixel just to kill it faster is just as much of a waste of time as failing a raid. In the long run you're already beating the raid anyway. In fact it's more of a waste of time if you didn't have fun doing it because you can beat it w/o said gear.
You said they were goofing off and having fun and they failed. BFD! Why? Because they ran it again and completed. End result, they had a good time got a completion and were one step closer to getting another pixel. Pixel or not they are already beating said raid so why not have fun doing so. Big deal if you wipe as long as it was fun. Why? Let's say you already had every peice of gear you needed on all your toons. What else are you going to do for entertainment? Go kill said boss even faster and not give a squat what drops because you have everything you need? Where's the fun in that?
This is exactly what happens on drunken raid nights. Most of us need zero gear from any of those raids but we still run it. Tis why newbies love running these things with us. They don't even have to roll on gear we just pass it off to them because we all heve 2-3 of them already stashed away from the last time we couldn't pawn it off because there was no newbie to give it to. We don't do it for gear or because the raid is fun, because most raids aren't after the first 10X running it. We do it because we make it fun, regardless of what we're running, there really isn't any content we can't finish if we set our minds to it, but it's more important to have fun because the gear will come sooner or later (I know epic raid gear qualifies as later for most of us as it seems to never drop).
Trust me some of the top players on Khyber who don't need anything from these quests still jump in the drunken raid runs from time to time. If it's not for the gear it's obviously to have fun and goof off.