What I think is being said here is that:
1) It's OK for responsible cyclists to break the law. They should be allowed to ride on pavements as they see fit, using their own judgement as to whether or not they are presenting a hazard to pedestrians. They should not be challenged for this breach of the law.
2) It's not OK for irresponsible cyclists to break the law by riding on pavements and potentially endangering pedestrians. The full power of the law should be used to act as a deterrent to such behaviour.
As I have already said, I think this law is very difficult to enforce fairly as it is presently worded and is consequently subject to widely differing interpretation. This is the hallmark of poor law. At the moment, if a police officer sees someone cycling on a roadside pavement, in the presence of pedestrians, we are asking him/her to make a judgement as to whether or not the breach of the law is such that a penalty should be given. Many police officers are ill-equipped to make such a judgement, all they will know is that the law is being broken and they may choose to react in a way that is innapropriate. Curiously, people normally expect police officers to act if they see a breach of the law, except, of course, if it is oneself that is in breach.............
By giving the police the power to issue on the spot fines for such offences, we are asking them to judge guilt or innocence (and the shades of grey in between that exist in many minor breaches of the law). They are not trained or competent to do this very well, hence the problems. The primary roles of a police officer are to uphold the law and keep the peace. Asking them to only uphold some of the law, some of the time, and for some of the people, depending on the individual circumstances, is not appropriate, in my view.
For as long as we have dodgy bits of law, we will have this problem. Usually the judiciary resolve this by the application of common sense, just go along to your local magistrates court and see how it works, it's surprising how often reality differs from the myths of popular reporting. Only the judiciary should have the freedom to make a judgement as to guilt or innocence, based on all the evidence presented to them and taking into account mitigating circumstances. A police officer technically doesn't have any freedom of judgement in this regard and should not be allowed to interpret dodgy law in a seemingly random manner.
This problem is with the way that the law is framed as much as anything else. It seems long overdue for revision for many reasons, not least of which is because it is based on a very old Act that no longer reflects the road conditions of today. It also doesn't take into consideration the plethora of mixed pedestrian/cycle paths that we now have, including many that technically fall within the remit of the original Act by being roadside pavements.
Jeremy