I think Center for Talent Development is sufficiently vague to most people, but if you came upon someone in the know then it might be slightly awkward. In theory I think he should be able to wear the shirt anywhere anytime because it's just a camp shirt, but in actuality I would be a little hesitant to have my ds wear it out and about.
What I generally do when my kids have a shirt that I don't want them wearing in public is I have them wear it as a sleep shirt, playing it up as "Wow, that will make a great sleep shirt! Very cool!"
