You know what? You don't know that, even for yourself. It is easy enough to say in general terms; but if we were talking about a specific player that the coaching staff wanted badly and that player changed his mind because of some other blowhard on a message board then I am betting you'd be upset, as would the coaching staff.
If a talented SA goes somewhere else because of an ignorant comment, then he doesn't get hurt in the long run. The program gets hurt.
P.S.
What if a talented player decided to come to GT instead of another school because of ignorant posters on another board? Would you reject the talent because of how he made the decision?
P.P.S.
This really isn't about the maturity of 17-18 year olds and how they make decisions. This is about the maturity of adult fans who don't want to be held accountable for consequences of their own behavior.