Mods like this could be usefull.
I have no idea what they have had in their shopping cart. Or maybe they newer had anything..

A mod or something in the admin that shows what people have latent waiting for completion could be interresting. or is that spying on personal issues ? : )

In these paranoid times, I think the whole thing about an obligatory reigstration is not the best thing.
Even if they need to give same information about them selves any way