A #keysigning isn't to establish paternity or create a genealogy (so no gov't ID or blood tests needed), it merely associates a GnuPG/PGP key with an identity. The identity doesn't have to be a #RealName; if we were to meet at a keysigning party and you introduced yourself as @inscius I'd accept that as your "identity", but for me to sign your key I might want to know you a bit long…