I wouldn't. no way..
I mean, if you are the book, esstenitally you are gambling... rarely ever are you getting 50-50 action on a game, so you a clearly rooting for the other side... Why would you need to gamble, unless you are laying off action....
I don't know why this is a discussion.. for me, I feel as if you are the book, your "need" for action should be met...And if you are "tailing" someone because they are sharp and your client.. why would you continue to allow them to place bets..you are following them because clearly you believe they can and will beat you... if you think that why continue to carry him as a client..... I can't think of any logical reason why a bookie would need to gamble.... just my opinion....