I don't really care so long as it's not made possible by ridiculous undertuning of the fights.
It's possible for these guys to do that only because they've got the skill, dedication and appropriate alt preparation to make it feasible with any degree of speed or success. If your average guild tried doing this, they'd probably fail because people are bungling around on alts that are neither properly geared nor skilled. It's only a problem when it's possible for everyone to do it reliably thanks to, as previously mentioned, a raid being far too undertuned. And when I say "undertuned", I'm thinking of a situation like post-squish SoO.
So, yeah. As long as it's only something being done by guys competing for world firsts and whatever, it doesn't bother me.