Basically, if you ever visit a website for the first time and it doesn't immediately bombard you with requests for cookies, work on the assumption that they're not paying attention to any regulations of that nature. Don't register an account on such sites up if you want to retain the right to be forgotten. On top of that, everything posted on Bitcointalk is independently archived by several forum users, so even if you could delete your account, there would still be a record of everything you've contributed here.
Bitcointalk doesn't set any cookies excerpt for the session cookie created right after you log in. This is required for logging in and technically classified as an "essential cookie" as otherwise this site would turn into a ghost town if everybody turned it off. So it would never need a cookie banner in the first place.
