How many former DS/DI/MTI , Navy, Coast Guard instructors have been contacted by former trainees?

I hopped on Facebook today after work and to my surprise was a message from a Soldier I'd had in Basic Training in 1989. It really surprised me. He gave me a brief run down of his military career. From what I could tell I must have done something right with this guy. I've always wondered if I'd given these new recruits everything I could to get them on a good start on their career.