Being serious about cookies has become a joke. Even government websites have their cooky policy totally wrong. Big companies do what they want anyway, just look at Apple, Facebook, etc. etc.
All you have to do is to inform your visitors what you are doing with your cookies.
Don´t be like the Big Data out there and be respectful to your visitors. Put your cookie
popup in a place where it does not interfere in anyway with your visitors, because they
hate it and click it away asap.