"This article is incredibly irresponsible! Railings are the worst place you can lock a bike to - because thieves can cut them or even break them with one kick. They are not as strong as most people think. Your strong lock makes no difference if the thief cuts through the railings with an angle grinder. And if you put on a high visability vest it's really easy to do this with an air of authority. Use a proper bike rack (of which, admittedly, there aren't enough) or failing that a sold piece of street furniture such as a lampost if you want your bike to be there when you get back."