We used to have all sorts of shenanigans with local residents in Haywards Heath with hospital parking. I had a permit, but some used the free parking on local roads to avoid it. One friend used to have his tyres let down on a daily basis which was resolved by an electronic tyre inflater, another had his windscreen spray painted black! Got to love a good parking dispute thread, can't wait to see the result of expanding foam in the snorkel!