For my next one, I thought I would canvas the collective wisdom of Slashdot =), for opinions on effective ways of securing a bike.
I've had people suggest U-locks are the best, and others that a heavy-duty chain from a hardware store with a padlock would do it better.
One person suggested somehow welding a car-alarm to the seat post, but I'm not exactly sure how this would work.
Alternatively, one idea I tossed us was using a GPS/GSM module (e.g. one from the Telit range) glued under the seat to send me the coordinates of the bike.
Finally, some people suggested sabotaging the bike somehow. Removing the seat seems to be a common option, but it is ultimately still rideable. Is there perhaps some way of making it so that it won't actually spin? (Most of the elements in the drivechain are tightened down fairly well, for obvious reasons, I can't think of anything that could easily be removed yet still be essential to the bike's operation).
Any thoughts on these ideas, or other suggestions?"