Disable Public Page
many server admins i know on mastodon opt to disable, through some manner, the public pages of users, upon request. this could probably be implemented in the software itself, and is very powerful, as it lets you enforce the user be logged into the web client in order to see the profile of a user
this means blocks cannot easily be subverted, and stalkers are much easier to be aware of
as such, i would suggest it be implemented into the pleroma software as a per user setting