Only if we have key signing parties. Few.  

 let’s do it 

 It depends on the user. Obviously today we have a lot of people which just like tosupport their status quo instead of finding reality. 

 How do we know if a user on nostr is an ai bot or not? I played around with chat gpt, its really impressive.
Reply guy is easy to spot because its just a copy of your own message. 
But I've noticed some users that follow me that always like my stuff within a second of posting? Surely that's a bot?