I would also be interested to hear how 'The Police Officer said so' can possibly be taken as more believable than the person being prosecuted (assuming they are a person of good standing without previous record). Expecially having seen cases where the Officer is mistaken, or just plain inventing stuff - do they have targets to fill on 'numbers of cyclists stopped', or the like? It seems odd that they have to wrongly fine innocent cyclists when visiting any road crossing in The Hague will get you 95% of cyclists sailing blindly through the red light, while I and maybe one other person get sworn at for having the gall to stop for it!
I realise we are branching out here slightly