I think Dallas can try and reign this is as much as they want but it's going to blow up in their faces. As we have already seen this year. Activities for the 50th that Dallas has planned has bitten them in the bum. RFK Jr's interview where he said the Warren Commission was a shoddy piece of craftsmanship, recently, the mock trial of Lee Oswald where there was a hung jury, and not organised by Dallas but relevant, jeff Morely's win against the CIA.
Dallas can ban the word 'assassination' or 'conspiracy' and try and stamp out free speech all they want, it's not going to happen. They will only end up with egg on their face - yet again.
The above examples go to show that people with power, people with a voice are no longer willing to or care to cover up this crime any longer.
Dallas, accept your history, it will do you wonders!