First -- RFID is insecure technology.
Second -- Think about this, you go to bike night. Park, you wonder around, every time you get near you're bike, it powers up (lights, ready to start)
Do you really want it powering up psuedo-randomly just caused you walked by or back to get something from bag -- I know I don't.
Are you really that lazy?
Still need a wheel lock to stop it rolling away, let's face it people ignore alarms.
An effective alarm, it is required to notify owner when it goes off aside from siren etc.
And given the trouble many have had with electrical issues on Big Dog -- do you really want another hi-tech gadget.