You better believe it!  Successful blackjack play is a game of cloak and dagger.  Really, it is and should be the casino’s right to block overly successful players.  If casinos are forced to deal to all card counters the advantage possible (due to good rules and penetration) usually disappear very quickly.  Case in point: Atlantic City casinos cannot bar skilled players.  As a result, they’ve changed the options and rules so everybody suffers.  If you’re good then spread your winnings around.  Don’t get too well known at any one casino or in any one city for that mater.