Account Purge

I am not looking to change my name but I would like this account not to be able to be pulled up by search engines. I want to keep a clean record to this username and I am not asking this as a member. I am asking this as a person who does not want to participate in activities that would be frowned upon in others. I hope you can understand my point of view :) otherwise i would have deleted it myself if given the option. Also if possible have my posts deleted since they can lead straight to other profiles that let people know my affiliation with this.