It seems that the offending post has been removed. But that being said... this is a rumour network and if there's some truth in it, well perhaps it is valid that it stays there.
If there are in fact "Joy Flights" being advertised, then a clear breach of the regulations is taking place be it RA-Aus or HGFA registration. Aside from the allegations of night and formation flying, Joy Flights are a clear breach.