Should the "Search User" plugin be visible to anybody, instead of its access being restricted to registered users?
I am asking this because having this feature at their disposal would help potential new users, who want to register, help in finding out if they are already here. They need to know if they have already an account on PhysicsOverflow (because they have been TP.SE users or posts of them have been imported from a still living SE site) to decide if they should regain their account or newly register.
I personally see now harm in making the "Search User" plugin visible to anybody, what do you think?