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 longer than that. It's more important to me to know that I'm communicating with the same person every time rather than knowing the name under which you file your taxes.