My suggestion is to "Make forum threads available to not logged in users"
here is an example thread which shows "Invalid Thread specified" when the user is logged out of the forum:
[Only registered and activated users can see links. Click Here To Register...]
If you want to test this while logged out, here is a link that will not be hidden:
hxxp://www.elitepvpers.com/forum/private-sro-exploits-hacks-bots-guides/3688346-release-certification-inis-cracked-hyperfilter-files.html
here is an example thread which shows "Invalid Thread specified" when the user is logged out of the forum:
[Only registered and activated users can see links. Click Here To Register...]
If you want to test this while logged out, here is a link that will not be hidden:
hxxp://www.elitepvpers.com/forum/private-sro-exploits-hacks-bots-guides/3688346-release-certification-inis-cracked-hyperfilter-files.html