Thanks for everyone's thoughts. I agree social media can have a downside, and son has very, very few posts (and I do check them periodically for reasons described here). Actually, the only posts he has are reposts others made about him from a PG affiliate after he played in a tournament, PBR, a coach, and from his travel ball organization and his contact information. Far fewer posts than most of his athlete friends and I have seen some of what I believe others are describing here on other accounts. Most of the athletes his age seem to have social media accounts and some post much, more more than others. Since he's so early in his high school career, I think he wanted to more or less have any account should he wish to communicate with anyone in the future. But as to my question: does he need to respond? And the answer is probably no response is necessarily expected. 
