The cynical economist's position would be that if utilitarianism leads to good results, and being antisocial leads to utilitarianism, then that is a positive side to being antisocial. For example, English social theories, which have lead to the most progressive societies, is intuitively utilitarian. Only valid to a certain extent, of course, but you might say that if you want to live in a progressive society, then you should be slightly antisocial.

I would also like to know whether this definition of "antisocial" covers the Buddha as well. Moreover, might not having non-mainstream tastes or opinions also be correlated with "antisocial" behavior?