JMO, but they should give serious consideration to putting some stuff into the hands of the Government. They've already made things happen in just a couple of weeks regarding the CoS thing, while the RF dithered for a couple of years.
Let them legislate whatever they possibly can over titles. A bill restricting non-working Royals' use of them would be a good start. You don't have to remove them immediately - just make it law that they can't be used for commercial gain or self-promotion, and that they can only be used in the UK and Commonwealth. Any breach will result in removal. Would sort Fergie out as well as the Harkles.
And the RF need to start vetting pretty much every individual and/or organisation that attends events much more thoroughly. Look at social media and anything that reeks of an "agenda" should be noted. You don't have a right to restrict free speech, obviously, but at the same time you don't have to give some individuals a platform. There are probably plenty more organisations who would welcome the support and opportunities, so why even go near potential troublemakers?
Same with the RR. Use local press where possible. Gives them a boost, and they probably deserve the opportunity far more than certain RRs, who are essentially just there to look for trouble rather than do decent reporting on what's actually happening. The US media in Boston are really showing our sorry lot up right now.