TV licencing

The assumption seems to be that anyone without a licence is abnormal and needs investigating.Their own website says 'we find one in six people that tell us they don't need a TV Licence actually do need one'. That means 5 out of 6 are wrongly pestered with increasingly threatening letters implying inspection visits and prosecution. I don't have a gun but I don't get letters about my lack of a gun licence. Even if you inform them of your lack of TV, and get on their 'register' it never lasts and more visits are threatened and prosecutions implied. The whole tenor is wrong with an assumption of guilt which is totally against UK common law and out of place with a revered public body.