I think that's a neat idea!
At the same time, I wouldn't worry about people crunching and selling -- it adds to the market volume overall which helps attract attention, and unless they're mining loads a day it probably won't tank the price. It also adds to BOINC power which brings its own benefits.
@jringo is right. There have been 2 million GRC orders placed recently on both the buy and sell sides, and neither really impacted the price trend.