"We are just trying to enforce the law as it stands" is of course crap.

There is no obligation to enforce every law, otherwise they'd be knee deep in cases about sumptuary laws and mince pies and all that stuff that's never been taken off the statute book. And how often do they prosecute people for dropping a sweet paper, or spitting out a bit of chewing gum?

They have a duty to use their common and prioritise. Which means in the jargon of the day, decriminalising Morris dancing and sessions in pubs, until the higher authorities can get round to recognising that these kind of things are and always have been, inalienable human rights.

Probably nobody needs convincing here - the value of rehearsing these kinds of arguments is so that we have them handy when we are talking to someone who actually needs convincing.