1. ‘No’ is already the default, that’s why you get the banners, to trick you into opting in. There are a couple of filters that you can enable in uBlock Origin to get rid of (most of) the banners.

Cool! I’ll give it a try!

It’s heatmap-calendar right?

I recently installed the “Dataview” plug-in, and it’s amazing. You can create documents or sections by querying data from other documents, effectively using Obsidian as a database.

It is opt-in, if you don’t choose any option on the banner it’s the same as choosing reject all. So, the best option is uBlock Origin with the “Cookie notices” filters enabled.

I’ve seen them in Germany, but between relatively small cities and towns.
Not Just Bikes made a video about Trams not long ago.