I personally have always found there's no value in re-inventing the wheel... assuming a new personna.... changing your Nickname.
Doing so just breaks continuity....people won't always then realise who you were...or are.
If you had a florrid past...so what? If that is behind you it can stay there without any need to rename thyself.
But that's only the half of it....
The BIGGER issue is with the creation of aliases....or second accounts.
A wiser man than me has stated MANY times that he loathes the concept of 'false identity'....mainly because it has been used to considerable effect against him and his co in the past...[on other sites in particular].
I agree, totally.
Aliases [unless you're some sexy chick in a TV series] are all about deception and that is almost always for a negative end.
When duplicitous [and duplicated] accounts are found on Wincustomize.com....they get removed. If they respawn then all 'versions' are removed.
I must admit however, that some of the motives for duplication are pretty feeble.....