> Keybase integration is interesting to me, but not realky useful since i don't want to tie mastodon with my real life identity.

Yeah, this is it for me. Also I don't want to tie my various online profiles together in general. Providing an open, strong, independently verifiable cryptographic link between my online profiles seems like something that a bad actor could exploit to harvest data about me far more easily and with a far higher degree of confidence than would be the case without it. It might even be hard to get rid of if integrating websites aren't careful about deleting your keys when you want them to, leading to a bunch of cryptographic litter linking your profiles even when you don't want that.