The StayLocked Bicycle is unridable when the locking mechanism is broken.

From Wired
…
The locking mechanism comprises a section of the seatstays — the two tubes that extend up to the seat from the rear wheel. Leinonen installed a universal joint at the junction of the tube and latches in the stays to secure it to the frame.
The locking section of the frame swings to secure your bike to a meter, post. Should an ignorant criminal break the lock, the chain stays — those tubes extending from the rear wheel to the crank — won’t support a rider’s weight. The bike will collapse as the thief tries to ride off with the plunder. Unfortunately, whether the culprit realizes the destruction before or after breaking the lock, all parties are left without a bike.
…

https://www.wired.com/gadgetlab/2011/09/bicycle-lock/oldId.20110914130945389