Follow up from T312945.

Currently, an unregistered user who is blocked locally through Special:Block cannot register for events.

From @gonyeahialam

As someone from a region that gets blocked regularly due to no fault of ours, there seems to be no way users can tell why they can't see a Register button and can assume the registration is closed. If I remember correctly, whenever a blocked person tries to perhaps edit a page they are redirected to a page that informs them they have been blocked.

Can we keep the register button and direct blocked users to a blocked info page when they click on it?