Urgh, what happens for a site when there are no adverts on the site? Are "clean adverts" then placed on the site? If the answer to this is yes, I'll be blocki

Urgh, what happens for a site when there are no adverts on the site? Are "clean adverts" then placed on the site? If the answer to this is yes, I'll be blocking the user-agent from my sites. I serve cache:no-transform and HTTPS to specifically prevent people mucking around with the page. I already deliver a fast and clean website. This reminds me of when Virgin Media in the UK (an ISP) wanted to put adverts on pages without my permission. It really isn't a help.