when does filtering become DWDC?

[maddog04]

there is no such thing as common sense in Law, so to say something like "common sense would tell you not to do it/slow down etc" is completely unforceable in a court

in layman terms, the reason is that my IQ is different from the next persons and what I consider to be common sense may be totally alien to what the next person perceives as common sense given the same set of circumstances, hence the term is load of old bollix and would be thrown out of court