Happens ALLLLLLLL the time in Football, heck there are even twitter account parodies of specific coaches(ahem Michigan coach, Alabama coach) who are notorious for offering 150 verbals a recruiting cycle for 25-30 roster spots. As for lacrosse specific, look at what is going on at U Tampa. The earlier and more frequent early recruiting gets, you can bet your dollars on it increasing.
Ok....so when does it happen ALL THE TIME in Lacrosse?? I only know of one out of the hundreds of kids I'm familiar with. And it was for a good reason, and all the fault of the kid. Can you please cite some examples of your false claims?