Well, I guess it depends on how paranoid you are.. :)

But (talking generally) if you're doing something illegal a po box is not gonna save you...

I'm still not quite sure what kind of distribution you're talking about - the final product?
That's not really anything to worry about at this point?

But if, say, 50 people are going to work on individual raw frames, then that method is going to be s-l-o-w. Snailmailing frames out... Working on them... Sending them back... Team leader or whatever checking them... sending back if more work is needed... it will be logistics hell...