Well, uh yeah that's actually how I had to compensate on mine. But that was only because they were bent from use, not made that way, so they didn't really have anything left to support my weight leaning forward when riding switch. But that was a factor of busted skis not the rocker.
A factory rockered ski shouldn't do that though, like if you lean foward on it, it will support you, you know? Just cause it's curved upwards, the nose will be any less supportive. You'll be able to notice that you have further to lean foward until your noses are on the snow, but the flex should support you unlike my worn sticks which were noodly and just gave way.
Needless to say, the later part of my season involved an increased frequency of switch landings into faceplants.