I feel a bit uncomfortable with people being able to change their name without telling us (so not you, Supernana). They could come back in a completely different guise and play tricks on us.
The other forums I use do not allow you to have more than one name from any one e-mail address or,indeed, from any one computer.
Sometimes it is fairly obvious when we have a 'returner' because it is hard to disguise your style - I am sure I would soon be recognised - but perhaps I could come back and very sweet and fluffy!