Is it bad form to ask or address a player in the hand when you are no longer in it ? For example: 2 players are working their way to the river. A third player asks one of them what his favorite gum is.
The player obviously does not have to respond, but a response or a lack of response could give away information. Or make the oponent perceive information leaks that aren't actually there.
The player has a duty to keep his information hidden and the other player has a duty to make correct reads. However, is the outside player out of line ?