Hahahahaha. This sounds ridiculous, and I think it is, however, there could be a kernel of truth to this. In his book Illumination in the Flatwoods, Joe Hutto makes note of how well turkeys like crickets. When raising his turkey brood, he would release crickets into a large cage and the turkeys would enthusiastically run into the cage to eat them. If a particular field or area always had large numbers of crickets in it, I see no reason why a turkey wouldn't begin frequenting that area just like they would if an area had corn it in.
As for legality, "bait" is defined to include "any grain, or mixture of any ingredients, used as or for food purposes." An officer might write you a ticket if he could prove you released the crickets, but there is a good argument to be made that a cricket is neither grain nor a mixture of ingredients. How much does 10,000 crickets cost anyway?