just supposing (God forbid!) that I took it into my head tonight to pick up my guitar , or a sitar or a kazoo and noseflute, and re-wrote I don't like Mondays. Made it about making jam in Somerset.

Are the PRS going to arrive jackbooted at my door and do me a mischief?

I think not.

Intellectual property is a game for people with lots of money. It means jackshit to 99% of musicians and songwriters.

I think you are making a mistake, making it such a cornerstone of your thinking and philosophy.