I lived backing onto a roundabout for 10 years. Hoons would do massive donuts at speed, at all hours, often spearing off the road. One neighbour had cars through his fence twice, across from him had a retaining wall that took a few cars out. Opposite him there was a drop to some gated units, a car came through the roof of one of them.

Roundabouts are brilliant, but they don't stop maniac drivers showing off.