Josephine! - Restoring a Joe Waugh ladies tourer

A more permanent solution, but works for me.

Superglue ball bearings in the seatpost clamp and saddle clamp bolts. You can still get it out with a needle, some acetone and patience. Three things thieves rarely have.

A much less permanent solution is by using grease rather than glue... impossible to get the ball bearing out with your fingers and shouldn't fall out. How to get it out? Just use a magnet.