<p>If you are going to restrict your S2’s choice, I’d tell him that right NOW. Frankly, like others in this thread, I think these concerns should have been voiced before applications were mailed. But if you feel so strongly that you will restrict his choice, I think you owe it to him to tell him NOW before the rest of the envelopes come in.</p>
<p>In explaining your reasons to him, I’d focus on his behavior, not his brother’s experience.</p>