Heya, rare site admin post here.
profounddecisions.co.uk and anything under it - including the forums & wiki - have been classified as non-compliant to Facebook’s community guidelines. This means that any links to the wiki or the forums from Facebook will be marked as spam, and retroactively messages and posts mentioning either may have been removed from Facebook.
PD are appealing to facebook - or, rather they are unappealing to FB but are going through the review procedure, so with any luck this will be sorted at some point soon. In the meantime, nothing on here or on the wiki is actually affected, only outbound links from Facebook.