Rumor has it that the penalty ranges from a slap on the wrist to a ticket for a few hundred baht. Thankfully the exchange rate is favorable and this is around $10 US.
Urban legend? No one on the Liverpool City Council will give credence to a law along these lines. Seems like there must have been a story behind this one…
There was a court case involving a woman who got a heel of one of her shoes caught in a sidewalk grating, fell, and injured herself. The city subsequently passed this law in order to protect itself from future litigation.