Notes on the usage of antisocial from the New Oxford American Dictionary:
usage: There is some overlap in the use of the adjectives unsociable, unsocial, and antisocial, but they also have distinct core meanings. Generally speaking, unsociable means ‘not enjoying, or avoiding, the company of others’: Terry was grumpy and unsociable. Antisocial can be used as a synonym for unsociable, but can further be used to mean ‘contrary to the laws and customs of a society’: aggressive and antisocial behavior. Unsocial can be used as a synonym for unsociable as well, but it may also denote a preference for solitude and not hostility toward company: Ben’s feeling a little tired and unsocial tonight.
Perhaps unsociable is a better word for describing mfm’s behavior.