It's true that a cookie banner (notification only) does not equal "the site can now do whatever it wants and is GDPR compliant thanks to the banner".
However, cookie notification banners are nothing to do with GDPR! They are to comply with an earlier (but still active after GDPR) bit of legislation, the 2002 'ePrivacy Directive' (sometimes known as the "cookies law").
If you don't go near personal data, but still want to use cookies for website functionality, then GDPR doesn't apply but you need to notify users of your use of cookies. If you are doing stuff that's covered under GDPR, then you obviously need to do more than just a cookie notification, and in most cases doing that 'more' will cover the non-personal cookies too so no need for a separate cookie notification on top.
https://en.wikipedia.org/wiki/Privacy_and_Electronic_Communi...
The cookie banners people are now complaining about are literally companies skirting or otherwise breaking GDPR. Because they now have to ask for your consent before the siphon your data and sell it wholesale to the highest bidder.
There are certainly plenty of examples of poorly implemented banners attempting to comply with GDPR while not actually being compliant, where consent is required, but I wouldn't call those 'cookie banners' since they generally talk about privacy and personal data, not just about cookies/local storage.
My point was that there are plenty of websites that don't need to comply with GDPR (because nothing they do falls under its scope), but they still need to comply with the ePrivacy Directive and therefore there are plenty of cookie banners used for that purposes that are a perfectly acceptable way of complying with that law - though because people are more familiar with GDPR than with the ePrivacy Directive, they see those banners and think it's a non-compliant attempt at dealing with GDPR.
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I think, but don't quote me in that, that with ePrivacy you don't really need a banner, but an explanation that you use cookies. But that is a minor issue
Hearsay and rumors, so don't take this seriously
But it's from 2017... https://eur-lex.europa.eu/legal-content/EN/TXT/?darkschemeov...
(If the twitter discussion was interesting, any suggested accounts to follow for this sort of topic?)
I guess you'd want follow
- Felix Reda https://twitter.com/Senficon (former European MP for the Purate Party)
- NOYB EU https://twitter.com/NOYBeu (fighting the GDPR fight)
- Max Schrems https://twitter.com/maxschrems (https://en.wikipedia.org/wiki/Max_Schrems)
These are more or less the usual suspects you'd follow :)
Those cookie banners are either non-compliant with the regulations or meaningless. Why people add them is anyones guess.