Card counting on a resume?

I just got back from a job interview (if I got it I could certainly increase my bankroll substantially) and on my resume in the hobbies section I included the mathmatics of blackjack. Low and behold the interviewer asked about it so we talked about it briefly. Do you think that this is a risky thing to put on a resume as they could associate it with the bad connotations that come along with gambling?

Especially since GA identifies most of us here as problem cases, do you think I should remove it from future versions of my resume? The position didn't have anything to do with blackjack but I thought I would put it down anyway.