In general, I give three strikes before removing a player. If a person makes a mistake, and does not repeat it, then there is no problem. People will make mistakes-as do I. Things that will get me to boot a partner immediately is repeating a pre-empt or underleading an ace in a suit contract (it is ok in NT). I have experienced 'players' who booted me because (in defense), I was setting their contract by a telephone number (or more). I also have had partners boot me because they did not understand my play-in this case it was a loser on loser play. I will take a person's rating of expert, and they do not have a profile, with a very large grain of salt. On a side note, if a player is taking far too long to make a bid or play, I will do a countdown from 5 before removing the player. I have played a lot of tournament bridge, and it is a timed game. Now, it is ok to take your time, especially at trick 1. Just my comments.