They don't care because they know their supporters, the Brexiter cultists, can't admit to themselves that they truested genuine charlatans, so won't turn on them. If the Brexiters did their house of cards, their entire world perspective and their faith in the path they alone set the country on, would come tumbling down. I'm surprised there's any room on the beaches in the UK with the amount of people with their heads in the sand.
Having people point out the lies just allows these idiots to play the victim. 'Oh you're attacking the government, etc. etc.'