Let me get this straight...
The user can see items on the screen. However, if he/she clicks on them, nothing happens whatsoever!!!
I think this a major bug. If the user does not have the permission to access something, either: (1) he/she should NOT see that thing at all, or (2) he/she should get a message telling him/her that this action requires login/registration 1st.
Suggested solution:
The relevant layout (Posts (Magazine)) should have the sections (Reviews, Reactions & Comments) as modules, which would only be displayed if the user has access to those modules.
Until this bug is fixed, I would really appreciate it if you can suggest a workaround ASAP (As Soon As Possible).