I've been a professional C, Perl, PHP and Python developer.
I'm an ex-sysadmin from the late 20th century.
These days I do more Javascript and CSS and whatnot, and promote UX and accessibility.
The easiest way to not display a massive deceptive banner is to display a massive, non-deceptive banner. If your problem is that the banners you're seeing are deceptive then the problem is that those sites are deceptive. Stop using them, report it to their GDPR officer or report them for breaching it, depending on whether it looks like an oversight or active deception.
The second easiest way to not display a massive banner is to not do anything that impacts your users' privacy. Don't use third-party trackers, don't use hosted ads, don't sell their data without their consent, that sort of thing.
What you have to think about GDPR is that in countries outside the EU, they have the same practices but don't tell you about them... and companies whose sites don't work in the EU for "technical reasons" are exploiting their users.
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The easiest way to not display a massive deceptive banner is to display a massive, non-deceptive banner. If your problem is that the banners you're seeing are deceptive then the problem is that those sites are deceptive. Stop using them, report it to their GDPR officer or report them for breaching it, depending on whether it looks like an oversight or active deception.
The second easiest way to not display a massive banner is to not do anything that impacts your users' privacy. Don't use third-party trackers, don't use hosted ads, don't sell their data without their consent, that sort of thing.
What you have to think about GDPR is that in countries outside the EU, they have the same practices but don't tell you about them... and companies whose sites don't work in the EU for "technical reasons" are exploiting their users.