Danny, I have no objection to accepting a cookie from PPrune but I don't understand why an advertising banner needs to give me a cookie. In particular I understand that doubleclick track your movements throughout the web - not something I would generally want.
Yes it is possible to set up your system so that you are warned when a cookie is being given, however you are then constantly getting security alerts and browsing becomes tedious. Is there any way that you can accept banner ads on your site without forcing us to accept their cookies?