I'm not sure if it gives much of an advantage or not as I'm not a limit player. However, if some people think that it does, then I suggest either banning it or making it easier to do. It seems a little absurd to make people close and reopen a table in order to get an edge (or to get what they think is an edge).

Btw, you really rule for doing this, and I'm sure you're stealing a lot of people from party by being so customer friendly.