Unfortunately, incidents like this are becoming more common:

http://news.bbc.co.uk/1/hi/england/s...es/4110770.stm
http://news.bbc.co.uk/1/hi/england/m...de/4562779.stm
http://news.bbc.co.uk/1/hi/england/kent/4285491.stm
http://news.bbc.co.uk/1/hi/england/somerset/4201377.stm
http://news.bbc.co.uk/1/hi/england/g...re/4091589.stm

And the one I remember from last year:

http://news.bbc.co.uk/1/hi/england/3639057.stm