I saw someone putting one into his “season parking” space at the train station - also on block paving - right next to a taxi rank! Told him how it wouldn’t work for the same reason! “Don’t worry, I’m going to use cement putting the blocks back in!” Realising that I was observing Darwin in action, I left him to it! Two days later he had a lovely neat pothole in his expensive parking space!I watched a neighbour fit one he made such a good sticking with it drilling into his drive I waited eagerly for home to finish before commending him for not breaking his block paving and then reminded him that they are only bedded on sand, whilst wobbling it