things user/profile systems fuck up, bad assumptions
- the user will never delete their account
- the user should be expected to individually delete their posts
- the user will never change their legal name
- the user will never change their email address
- the user will never change their phone number
- if they do change those things, surely they will think to use our change info ui before getting rid of their old name/phone number/email address
- the same as above, but with SSO linkages
- the user will never die
- the user will never be arrested
- the user will never be subject to search and seizure