I have thought of a way to stop people from picking your Kryptonite lock
with a Bic pen. It works by placing a steel barrier a short distance above
the keyway, allowing the key to enter and turn, but preventing a longer
object, like a Bic pen from going straight in. I don't believe a pen
inserted at an angle has any hope of opening the lock.
I atried this yet, but my idea is to drill two holes in a piece of flat
barstock, so it can be threaded over the two legs of the "U". At the key
end, it would bend around the locking cross member, leaving enough room for
the key to be inserted, but preventing anything longer, like a Bic pen from
going in straight enough to be effective.
When I get around to building this, I may run into problems, or reasons
why it won't work. In the meantime, if anyone has other thoughts, or wants
to jump in ahead of me, feel free. All I want is to see the problem solved.
I realize that the thing I am proposing could be defeated by a determined
thief, but at least he would need more than a plastic pen to do it. A
crowbar, maybe.