Wel I can vouch on first hand witness evidence , these thing can really break your car, and people havent wised up yet!!!
I saw the (sad) demise of a Renault Clio this evening and the spontaneous discharge of several pints of oil over the road. There is a sort of little lake of oil around the bollards (there is actually a big wad of absorbent paper no doubt to soak up the oil from several previously damaged sumps) which you might have thought would give a hint to any other drivers wishing to chance their luck......
Its the first time i have wished I had a cameral phone, if only to let you good people have the proof of the pudding so to speak.
F