This is a non blackjack related question so maybe it should be moved.

I was at one my local casinos and was successfully vulturing some of the "must hit by" slot machines.

I already have a players card at this place, but rarely play BJ there due to real/perceived heat.

Is it possible to get backed off for only playing slots/VP when they are in a +EV state? I sort of assumed that, in general, most stores won't even notice/care about that, and if you already have a card with the place, the comps for playing slots would only increase the EV. Am I wrong to assume this?

Thanks!