"This is England. We use common sense here. It would get really boring if all obvious things had to be written down."
I see your point, but you also can't prosecute for lack of common sense. If there is a maximum number of papers that can be taken then people need to be made aware - without this, the British should always result to tutting and shaking their heads rather than litigation.
We also don't have a great deal of information. Did they steal hundreds of thousands of them first thing in the morning to stop people reading them, or did they pick up a couple of bundles late in the day when they were only going to get recycled anyway. I usually grab quite a few when I'm in the city because it makes quite a nice base layer for my rabbit's hutch. I mean I like the journalism.