30 min lockout can often be better. During the 30 min you can do other things like craft, gather, hunt, or play cards. So that 30 min can still be very productive, and if after that you get a 15 min run, you effectively have saved 15 min of your time. So this argument doesn't really work.
Having said that, please don't do this, because it is very selfish. Although, I have to admit that I am guilty of this occasionally. If i queue for low level roulette 30 min before raid time and got one of those that might take 45 min or more with multiple sprout players, i would just type sorry and leave.
