If they don't have any other choices except to walk on at other places then it is one thing but if BYU is trying to get them to take their PWO over another schools scholarship then it puts more responsibility onto BYU because those kids have actually given up something of great value.
Keep in mind I know a thing or two about this, I know what has been said and the approach they use on some of these kids to take PWO's. This isn't something I just heard from someone else.