It's a necessary evil to make the game more marketable. Watching poker without knowing the hole cards is pretty damn dull. They used to use cameras but RFID is cheaper and lower friction for players. FWIW major tournaments and other casinos with streaming shows have been using them for years without prior incident. It should be a fairly securable system in principle, just ban devices at the table, and don't let players have access to the equipment, but Stones was clearly way too lax.