Installed Membership 2 Pro. Set up one SUBSCRIBER user with the membership that protects one category of posts. Defined to NOT show the admin bar to subscribers when logged in. Simple right? The menu shows "Member Content". When selected, the page prompts for a login, as it should.
1) When the SUBSCRIBER logs in the Account page shows up AND a BLANK admin bar. If the SUBSCRIBER then tries to get to the dashboard /wp-admin/ he'll get there and see what an EDITOR sees. That SUBSCRIBER could then edit, delete, create all sorts of havoc with Posts and Pages and some plugins!! But since the admin bar is blank, there is no way for that SUBSCRIBER to log out.
2) When the Membership 2 Pro is active and all users LOGGED OUT, the WP prompt "Edit this entry" on pages, or posts, or widget content is visible everywhere in the site (in all browsers). If you click on it, you are prompted to log in with the WP login screen.
3) When I deactivate the Membership 2 plugin all "Edit this entry" prompts disappear and when the SUBSCRIBER logs in via WP login, all he sees is his Profile as he should.
Sorry, it seems that every time I post something at WPMU it concerns some kind of a bug in your plugins. Perhaps I should get paid as a tester?
I have screen prints, but couldn't attach them here.