There's also another leak which isn't really shown here and that leak is that, with just a public key, you can offer to servers and they'll tell you if it's pre

There's also another leak which isn't really shown here and that leak is that, with just a public key, you can offer to servers and they'll tell you if it's present or not. Using this you could scan the internet (given 6-12 hours and a shitty VPS that you can throw away this is quite possible) for someone's public key to find all of their servers, which could lead to a bypass of DDoS protection, identification of a Tor hidden service, etc.