I think it's safe to say that taking a picture of your ID and uploading it _anywhere_ on the net is the last thing you should do.
True. Also e-mailing it around to everyone who requests it is a nightmare. We should be looking to the Estonian model of managing ID (e-estonia). I've also seen id done on the basis of your bank account (cf. miicard.com) which is a bit bowel-loosening.