The policy is a little different...

We do allow username changes, but you either need to be (1) a brand new member who just entered in the wrong choice and would like it changed (less than a few posts or just a few days here); or (2) be an established member, but have a fairly good reason for wanting the change (because it will usually be confusing to other members here).

But if you don't want to be associated with your posts, you need to register for a new account and alert me that you're doing so so that I can disable your old account.

DocJohn