If Dabo is not upfront in telling his verbal commits that this is how he handles this situation, then that is really poor taste on his part. However, if he is letting them know that this could/will happen if they visit other schools, then the onus is on the player.
Dabo makes it clear to every recruit that wants to commit what he expects from a commitment. The kid knew what was liable to happen, and only had to look back a little over a year ago to Marlin Lane to know that Dabo is serious about it.