Members booking into CL sites

It would seem the Caravan Club and Motor Home  club  rules are not being adhered  to when booking a C/L site. I have used C/L sites 4times this year and not one of those sites asked for my club membership number, either at the enquiry  stage or when arriving on site. Is this leading to a situation where you need not be a club member to book these lovely small sites?

I would be interested to hear both members and administrators views.  Canoeman30