|DON'T LOCK UP LIKE THIS!|
First I was considering some sort of pin-stabilized frame security, where you park the bike, remove a pin or similar key piece from the frame, perhaps leaving a key structural member joined only by duct tape or some other temporary and frangible material, such that a thief who hops on and rides away would find the bike disintegrating beneath him once he got up to speed.
Then I thought, no, in the first place probably too expensive based on what frame couplers cost to add to a frame, and I thought instead, how about an exploding dye pack like they use in banks! I picture the thief riding off on someone's work transport, and three minutes later, PAFF!!! a giant, and I mean GIANT, cloud of indelible bright pink dye engulfs thief and bicycle in the middle of the street. Mounted on or near the stem, said exploding dye pack would give bike thieves a bright pink surprise.
|Conceptual view of exploding dye pack bicycle security feature|
But, lacking such a dye pack, you don't want to lock up your bike as in the first photo, unless you want to come back and find that a thief took advantage of that quick-release to quick-release your bike and leave only the wheel locked up. See what I mean?
PAF!! Man that would be satisfying, if just for a moment.