One of the points GM Daniel Naroditsky has made about this is that even with the heightened security, it would still be possible to cheat in over-the-board events. https://www.youtube.com/watch?v=ZZ-51lNSe8U
"non-technical example of people using signals when players leave the board (in the bathroom, over a balcony etc) and in technical ways suggests that certain earpieces could pass checks or potentially other small devices"
