I would like to include a scanned signature in my PDF and send it via email. Call me a tin-foil hat but I know how easy it is to open a PDF using, say, inkscape and extract the signature graphics from the file. I think this is a security issue and I would like to prevent my signature from being out there, floating around as a file.
Disclaimer: Of course, I'm aware that it's possible to just scan or cut out my signature anyway. I just want to increase the amount of work for someone with minor nonsense in mind. Also, I'm interested in the technical side of the problem.