Brings up an interesting socio-political question: are we only bartenders where we 'work,' or are we bartenders while we're "here," with limited responsibilties?
In other words, are we bartenders only when we post in our designated forums? That idea raises for me a notion of 'jurisdiction', which seems to me better applied to sheriffs.
Kidding aside: bartenders don't have 'off-duty' signs: people know who we are. It would be nice to retain the handle wherever we go, and avoid confusion.