I am not sure I understand... How can a player who is not at the table bet? He is not there to pick his chips up and place them out. Is the the dealer putting his hands into a players (who is not there) stack and calling a bet?
If so, that is all sorts of wrong. I would love to know what venue does this.
Now if its a situation like the player is coming back to the table and knows he won't make it in time to check his cards when it is his turn to act - he might yell "I call!" in the hopes to see the flop blind. I have seen some dealers let a player to do this.
That is all sorts of wrong too!
Just the other night I was dealing and player was on his cell phone. When it was his turn to act he called his hand dark (he hadn't looked at his cards), and proceeded to argue that he could do this as long as he hadn't looked at his hand.
All sorts of wrong again... but it took two tournament directors to convince him cause he certainly wasn't listening to little 'ol me.
I think all players, dealers and tournament directors should be held accountable for the integrity of the game. If you as a player see a dealer make a mistake, speak up! If you as a player or dealer see a tournament director make a mistake, speak up. Often times its an honest mistake - but the only way to get the kinks out is to make them known.