Well, A) They did ticket it.
B) Well, yeah, they knew the floor was glitching, they did it in 10man where it wasn't broken. But they didn't know they were causing it, and when your choices are, "Stop playing the video game during the scheduled time for 25+ people to be online," or, "Continue to beat the fun boss," uh....
Which is why I laugh so hard at all the posters saying, "They're not releasing a video, they're guilty." I don't think it's ever been in contention that the fight wasn't buggy. Banning them for it is fucking retarded.
A: prove it
B: Maybe if they'd continued to do the fight as intended - you know, killing valkyries and not standing on the outer platform, I'd have sympathy for them, but uh considering that the evidence shows they deliberately tanked the lich king on the outer platform and deliberately ignored the valkyries, it's pretty clear that they were intentionally taking advantage of the bug - even if they didn't know what the bug was that they were taking advantage of.
Whether they were deliberately aware of the bombs or not is irrelevant, they were aware that the fight wasn't working as intended and were aware that where they weren't supposed to be tanking/dpsing the boss there and they weren't supposed to be ignoring the adds. Kungen could prove that they were actively doing the fight as intended - as in, killing and not ignoring the adds, but he truncated the logs during that segment of the fight and is refusing to provide them to the community at large.
Ensidia has had a long history of exploiting fights to get world first kills. The question of whether or not those exploits were intentional or taken advantage of on purpose has been up for debate, but the evidence is pretty clearly against them in this case. Knowingly exploiting a bug is knowingly exploiting a bug whether you know what caused it or not. This isn't like Vashj dropping 20% of her life all at once because of a hard to repeat bug during a transition, this is "We know the fight isn't supposed to work this way, and we know we're supposed to do this in a different way, but we don't care so we're going to bypass all the difficulty of the longest phase."
If they'd been tanking Arthas in the center, away from the collapsing platform on the edge, where Defile can actually be a relevant AOE, it'd be one thing; If they'd been splitting off DPS to kill the valkyries on every pull, it'd be one thing; but as far as the facts arrayed show, they knew that something they were doing was allowing them to bypass that segment of the fight provided they were standing in the right position, handling the boss in the right position, and doing things exactly the right way. So, whether or not the bombs were the cause is irrelevant.
You can justify it all you want, Rico, but at the end of the day they exploited a bug to complete an encounter. They've done this constantly, and their raid core gets paid to do it. It's about time something was done about it.