I don't think you need to respond if there is no interest on your son's part. As for the others. If you've got a school your son is intersted in....just go ahead and email the coach....especially if you know he's seen your son and expressed ANY interest...heck, even if he hasn't, an email won't hurt. The questionaires are fine...go ahead and fill them out, but don't be afraid to email the coach directly. You can find the coach's email on the school website....no always on the baseball page...but every school's athletic page has a "staff directory". The email address for the coach will be there. My son emailed 75+ coaches about this time last year (he's a 2015). We received varied responses...some personal, some generic...and some nothing at all. The crazy part is one school we emailed several times...that never responded...not even once....ended up calling my son July 1st. It was his first contact with them....and he committed to play for them less than 3 weeks later.