What if the government sends someone with fake IDs to your key signing party? Not sure if this actually happens, but they're the ones who are issuing all those

What if the government sends someone with fake IDs to your key signing party? Not sure if this actually happens, but they're the ones who are issuing all those government IDs in the first place so why not? This is a world where some guy can claim to be Satoshi Nakamoto and fool a bunch of Bitcoin experts in an offline demonstration. What chance would we stand against a real-life Jason Bourne?