[Paul]

Most towns and cities have areas where certain services refuse to go due to problems with attacks or vandalism etc. It's normally down to small groups of idiots whose actions make it difficult for everyone living around them.
A lot of these problem areas occur in areas where old, badly designed and badly maintained blocks of flats are used as low-cost housing solutions.
I know of areas of Peterborough where it got to the point that busses refused to run at certain times of day, there are also areas here where even the milk floats have to have security cages around them.