I've thought of this before, but dismissed it as being completely dishonest. What happens when your client decides he/she likes Tony and decides he wants to tak

I've thought of this before, but dismissed it as being completely dishonest. What happens when your client decides he/she likes Tony and decides he wants to take you and Tony out to celebrate some business milestone that your service was key to achieving? Do you get a buddy to play Tony? How far down the rabbit hole will you go? Even worse, what if the clients decides to sue based on some bad advice "Tony" gave? Then you're in all kinds of trouble. I appreciate the advantages of psychological separation between founder/pal and money chaser, but why not just send an email from 'Accounts?'