What is it that people are really concerned about - the risk of a bushfire starting or the risk of being caught speeding ... I suspect the latter.

By way of correction Cultana the Port Lincoln fire to which you refer was not started by a farmer's exhaust, they are very aware of such potential hazards, farmers in the district Marble Range, where the devastating fire started ,were outraged to find it was a moron prospector who should never have been there, and was there without permission and his vehicle exhaust was faulty as was his car and his brain...total fire ban in force and catastrophic hot north winds........he was charged later with the offence....very dear friends of mine lost their two children and their mother in that fire....nine folk in total lost their lives....I agree one can't be too careful....Hoo Roo