[afiori]

> At least they will trick you with button colors

I agree with the broader point, but principles of a nice user interface also apply here.

Unless the website tricks you into clicking a button that you did not intend to click (like with your double negative example) it is not a trick. If you do not read and just click the most colorful rectangle to make the pop-up go away that is the user problem even under the GDPR