I live in really tight quarters. As a result I ship out just about all of my saved seed. People who run give-aways like Trudi Davidoff, or Robin Marble, have both the space and temperment to run them. And I don't need to worry too much because one or the other of them is going to keep me in seed that I haven't saved yet, whether I want them to or no.
This can't do anything other than muddy the water, and I need a steady stream of those 'new guys' coming on.
IMO seed security is when everybody who wants some, has some.