Well I don't meant to be disrespectful or anything but the rules actually say:
That seems to mean that if one chooses not to publicly admit to any alts then all alts will be "closed" and the account with the most posts will be left open as the main (assuming that not enough infractions transfer to ban the main).If a user is found to have multiple accounts, all but the main account (the one with the most posts) will be closed, and any Infractions earned under the alternate accounts will be transferred to the main.
And Tormsskull, If you don't want to publicly admit an alt just PM the info to a mod or admin.