I think it was in The Seventies that there were a series of TV plays revolving around the theme of 'Against The Crowd' - people going against the prevailing view. I sometimes feel I have lived my life imitating that idea. (Don' get me started about isolating it was at the time to apparently be the only person in Ipswich who understood that the start of The Millennium would be in 2001 and not in 2000.)
Probably as a result of my interest in the truth, I stopped wearing a cycling helmet two/three years ago and have no end of arguments since from people who believe they know what the facts are. (Initially, I was reminding people of a Mark Twain quote: 'It is easy to fool someone, than it is to convince them they have been fooled', until I bothered to do my own research and found it's likely he didn't actually say that, at all. Oh, the irony.)
All things being equal, I expect that it will be made compulsory in my lifetime - I will not stop cycling, and I doubt I could be principled enough to face any prosecution for not wearing one, but I will find a way of protesting.