Oh, I see. I didn't understand the process, and was imagining something like using a disk cutter to slice through the seat bolt. Thanks for clarifying that.

I do, however agree with Fuzz that essentially a little security goes a long (way in most cases). It all depends on how risky one's lockup scenarios are, and how risk averse that person is. Of course, I'm a guy who has had three bikes stolen in his lifetime thus far, so maybe I'm not the one anyone should be taking advice from!