I think for the purposes of this debate we can define a 'fine' as something that's imposed by a properly-authorised person as a result of breaking a law or a regulation, i.e. getting a ticket from a traffic warden for parking on a double-yellow line. That most definitely is enforceable. Any thing else, well, maybe not so much, after all, most sports clubs have 'fines' for being late for training or whatever and I very much doubt that they are legally enforceable.... also, there seems to be a thing with whether its a fine or a fee: does it really matter what you call it? if you dont return a library book you get a "fine" and im certain that is not actually a crinimal offence. in fact, it occurs to me that other than motoring offences, most "fines" are not actually criminal matters. A policeman does not come round and arrest you for the offence of not paying paying your council tax, the council takes you to court issues fines and court appointed baliffs visit if you dont comply... all outside of "criminal" system is it not? pretty sure you cant get a crinimal record for not paying a parking fine issued by the local council either, again its technically a civil matter isnt it?
Anyway, minor point, carry on, this is actually quite a good discussion.