So many terrible sorcs and sages in this thread.
The point is, when marauders use their CD's, everyone can still react (including cc'ing)
When marauders get cc'ed like every other class, you get beat to hell and can do nothing about it for the exception of once every 2 mins.
edit: also, its a proven fact that marauders are superior players due to how bad they are for the first 30 lvls, thus overcoming the op'ness of other classes.
This may be why these terribles have such a hard time with marauders.