What the story (intentionally, I believe) fails to mention is that this does not affect all U-locks or even all circular locks. Only a specific few models of Kryptonite locks can be opened in this way.
Other locks with circular keys could probably be opened if a hollow tube of sufficient diameter could be found. This one is just shocking because it turns out that the key's size is almost identical to a ubiquitous item like a Bic pen.
By the way, other locking devices using the same mechanism can be picked in the same way. As I understand it, you can defeat some notebook computer locks with the pen trick as well.
I don't lock my bikes anywhere ever. If I ride to work, I bring my bike into the building with me.
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