AUTH doesn't seem widely used. Do clients sign them automatically?
Malicious in the sense of surveillance/phishing. So say someone sends you an email with a link pointing to `/notes?relays=wss://bad-relay.com/myemailinbase64`, you click on it and your client auto-signs an AUTH challenge, bingo bongo they have correlated your email/pubkey. Basically an injection attack. As it happens, nostr:nprofile1qqs8hhhhhc3dmrje73squpz255ape7t448w86f7ltqemca7m0p99spgpp4mhxue69uhkummn9ekx7mqprpmhxue69uhhyetvv9ujuumwdae8gtnnda3kjctvqythwumn8ghj7enfd36x2u3wdehhxarj9emkjmn9keq8hx pointed out that this is already possible using nprofile/nevent 😬
Discussion
Coracle does (this needs to be improved)