A lot of moving parts but which bit is causing people to throw their arms up in horror? Yes you can pick a route through the regulations about the complex nature [with reference to rating] of the aircraft, its N registration, the PPL and cost sharing flights. Yet that seems more effect than cause of the accident.
Many sat in the peanut gallery have been waiting for the potential to say "I told you so" about this type of flight yet very recently the CAA clarified amongst other things that advertising the availability of such flights were not a problem. So I say again whilst we may discuss many points the revenue streams seem a moot point as far as it relates to the aircraft ending in the sea.
As to awareness one might struggle to understand how anyone might think that arranging ones international travel via a facebook page without any other due diligence [making a huge assumption that this is what happened here] then I think you get what you pay for, or perhaps not in this case. For other premiership football players I would highlight that companies such as NetJets exist for your private flying needs.