You're right, that's wildly broken and bad. But I'd like to know the exact degree of bad: is it (2) or (3)?
1. automatically creating your first Stack Exchange account, which exposes your email address to the company and some moderators.
2. automatically creating an account on new sites, which exposes your email address to an additional set of moderators.
3. automatically re-creating accounts/preventing you from effectively deleting your account.