Followup 3094f32ff5c7dec5be7ff4f01e6a855987f8d778,
this fixes an issue with the logic in this commit where
we were returning false if any of the conditionals here
were false, regardless of the type of `obj`, where we should
have only done this if `obj` was a `PostAction`, which lead
us to return false in cases where we were checking if the
user could edit their own post as anon.
61bd7d5d11