here's my two cents...
If he's 20, has "wicked natural genetics", and has not hit a plateau, I wouldn't let him touch 'em.
Pinnacle products are under-dosed crap, so he probably won't do any harm, but my concern would be that he may give credit for his natural gains to taking this product and next time he may want to go with something "better".
If he's making great gains, I would steer him away from all PH/PS, etc. I would tell him to take an advanced protien supp (VP2 is good, just because they make lots of claims on the container), or some other useful but harmless product and tell him it's every bit as powerful as the poppers. If you sell him on it, it would probably be enough to give him the psychological edge that he would get from taking the poppers.