If I had a 16 year old son and you contacted him through a social media site without getting my permission, we would be having an unpleasant conversation.
Lots of Parents
Maybe don't worry about being the first person to interview a kid? Talk to his parents or coaches first. Is taking one extra step to create contact with a high school kid such a bad thing? Especially considering that the extra step will protect you from a lot of potential hazards?