Short answer, you don't.
If you don't want to come back to the forums, simply don't. Alternatively, log out - you would then be in the position of any other non-registered user, often called "lurker", with the ability to view but not post.
It's a back-end forum thing; as a result, we just don't do that.
Please feel free to PM me with any concerns or questions.
Worktroll, Administrator.
