I should probably do that. I've always hesitated because the paranoid part of me thinks they'll catch on to it being digital if I have to sign in ten different places and they see that the signature is literally identical for each one. My Krita solution, while annoying, allows for me to have a slightly different signature for each one, for each form I sign, allowing it to pass all but the most judicious level of forensics.
Granted, no one is going CSI on anything I sign. I should probably just make like ten pngs of my signature and paste those in.