Well.. I wish I could get my name changed. This is why:
My name is "unb4nn3d" and I wanted it to be "Unb4nn3d".. >.>
If someone wants to change it.. I'll go =D, but apparently it's denied.
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But overall, I do not think that this is a good suggestion, as what Finn has said above. Have the chance to hide a scam you have done would be a golden opportunity for scammers, and the people that you know already you may never know them again, for their name has changed.
For example: My name is "unb4nn3d". What if is was changed to "Insert Name Here"?
-You wouldn't know it was me, and you'd probably never remember me.
In addition, all posts and threads would have to be changed. The best option to do this, is to have your one account locked or banned, and just create a new Sythe Account with the name that you want. I mean, if it means that much to you, then that may be the route to be taken.