Bojack1 said:
The only way it would affect someone else is if they were playing with an advantage also.
Even if they aren't playing with an advantage, you are still making it worse for them. If they are playing at a disadvantage, you're only making it worse. A basic strategy player thinks he is playing at a certain disadvantage, but it is worsened if he gets less hands in at postive counts and more in during negative counts.
So the way I see it, you can affect people that are playing at a disadvantage too, you're making the disadvantage even greater for them.
Whether or not they are counting they are waiting for the 20's and blackjack's just like you are. They are sitting there the whole time waiting for them, and when they finally should come out, you come in and "steal" some.
I don't think you're doing anything wrong, but you are still harming other players whether they are playing with an advantage or not.