probably just a random one shot but i just spotted someone at the ip address 121.99.222.6 @f0f85cdd is returning auth challenge responses with the challenge missing

i've seen this before, just on the off chance it's actually someone who is developing stuff and that's not a one-shot signer that has been incorrectly implemented, the auth is not populating the challenge field correctly 

 @f0f85cdd is probably not a human but if so, only a lurker, and using a broken client, or a bot with badly written auth code

they did actually publish one event, a kind 10002 (relay list) with the following ID c24fde4a1b50fea2d804534ce91210dc497bdf6c0b9f78ebab4d83321f27e4cf