Tweet, tweet.

I don't use and don't understand Twitter, so maybe I'm missing something, but apparently Cambridgeshire police sent out a tweet saying "Doing a bit of gardening this weekend?  Make sure your hedges are neatly trimmed, max 1m at the front and 2m at the back".  Two things occur - what business is it of the police how high your hedges are, and secondly what about those - like me - who aren't on Twitter? Is it one law for the twitterati and another for everybody else?  Can't see the sense, myself.