I've used the same punting name throughout, started when I punted street girls. In hindsight it was stupid then because if I got pulled by the police I'd be even more fucked when the prossie called me by a false name.
Kept the same name going and only blurted my real name out once, the prossie actually opened the hotel room door, shook my hand and introduced herself. For a split second I thought I'd walked into a work meeting and without thinking gave me real Christian name. Not that I've been to many meetings where I've met a sexy young blonde girl wearing only a bra and knickers. Might try imagining it tomorrow when things get boring though.
My thought is that if I ever fucked up, met a prossie in civvy street or a prossie phoned me and Mrs CBP got wind of it they would be calling me by the wrong name - easier to say daft tart must be mistaken.