Here’s an informative forum post from a few years back that may answer some of the issues raised in this and other recent posts.
Professional Signing Agent/Notary Union?
My submissions address all these issues from a “let’s start a union” perspective. It’s worth a look. And, mind you, whiIe agree with the problems stated by this author, I just don’t think they can be solved for the reasons I’ve given in my various responses in the thread I’ve referenced.