Thanks Mark. Not gonna get into a bun fight over this but the reality is that, out of the box, Easyblog 3.9 ACL is configured in such a way that, when coupled with a Joomla mis-config, enables these spam-tards to compromise a website. I might have finally got rid of most of the crap content from my site, but I have back-links from a significant number of other websites (I can send you the disavow list if that helps, which continues to grow).
My view is simple, prior to implementing Easyblog 3.9 there were no issues with my site, then there were. I am glad to see that Easyblog 5 has closed the loop
which is why I made the switch; and I have also made the appropriate Joomla config changes.
With regards to the Facebook thing, I think I can get around this for now as I have added AddThis share buttons beneath the blog posts; If you have a manual for Easyblog 5 I will happily work through that to ensure that (the current on-line manual seems to be for Easyblog 3.9).