Is there any reason that you have forums like Peer-to-Peer Discussion visible to non-customers if they can't read or post in it?
In my opinion, it makes it more of a pain to mark the topics read.
I would suggest that you just make these forums hidden to non-customers.

But, this is just my opinion.

They're visible (but not readable) so that non customers know there are more discussions they can participate in, and so they know there are member-only areas of the site.