If you're talking about Colorado, you're in a regime where the min bet is $5 and the max bet is $5. I don't think the casino thinks that's beatable, no matter how many spots you occupy. I don't think it's beatable. The casino, if they notice, probably thinks it's funny, like backcounting a CSM (okay, not that bad...)
I've been backed off with $50, $100, and $350 max bets. I've been preferentially shuffled on with a $75 max bet. It's highly dependent on the place you're at.
Douching = shuffling up, bet capping, or flat-betting.
Backoff = Invitation to not play blackjack. or maybe even any table games.
Barring = prohibition from the casino. Preferably accompanied by a reading fo the trespass act.