There's one local fanboy who fancies himself a Big Time SF/Fantasy/Horror Author. (He doesn't want to write -- too much like work -- he wants to Have Written.) All he sends out are "Proposals", never the finished stuff.
His latest "proposals" (besides the puff piece on himself he put in Wikipedia/Wikifur) are movie scripts -- to hear him motormouth at parties, he's Now A Major Playa (TM) In Hollywood (TM).
Rejecter, have you had to deal with the likes of him?
I don't know who this person is that you're referring to specifically, but there's certainly at least a dozen of them at every major gathering of unpublished writers (known as a Sci-fi Convention). I've met these people at cons, which I now avoid assiduously for that reason.