It's done all the time at Green. I think most of the people I know "Push" cranks, rather than actually "pull" them. By "Pushing cranks" I'm referring to using lead trolling weights ahead of the crank ... as opposed to "pulling" them without weights (longline trolling style).
I've tried it a few times, with others & by myself ... and caught fish. It seems to be one of the better methods to use when the lake water temps are over 70deg and pushing 80deg and the Crappie are on the flats and suspended around the Shad schools. When the Thermocline sets up, that will determine the maximum depth your cranks need to reach.
Then again ... last year, at the Spring Fling (early May), there were people catching Crappie on cranks ... out in 30fow !!