I think we're long overdue for some creative technology applications for bicycle security. If people can do a "lojack" thing for their cars & laptops, why not bicycles? Motion activated cameras would be a good idea.
I'd also be tempted to set up some old-fashioned "bucket of slime on your head" options... tho' I wouldn't want to incite rage, either, on general principle. Or, motion detectors that activate lights and/or sounds that would simply freak a person out (or activate flash cameras).
I've long wanted a special "Onstar" option -- so that if my bike moves and I don't do the programmed response, the thief gets a message that "this is onstar. If you do not activate the sequence, we shall activate the squirtseat in five seconds."