I've been told T&A after you bought a product is actually not legal in the EU. The popups still appear, and everyone clicks thorugh. It can't be legal. Whatever they want me to agree with, they have to force me at checkout time. Everything beyond that is plain ransomeware.
It kind of depends; there's a difference between Europe and the EU, for one. But there are also things you can hide away in the T&C and privacy statements, while other stuff (usually involving PII) needs explicit consent and opt-outs.
The EU mandates the presence of an emergency cellular radio on board of new vehicles in case of crashes. It took some convincing, but that radio is now supposed to be off by default.
You can demand a refund for Windows keys that came along with your computer if you disagree with the ToS (which has been tested by a French court IIRC), and that ability is actually included in the Windows EULA these days, but getting that kind of thing enforced will be draining. Repeated calls and repeated emails at the very least, filing complaints and threatening legal action if the vendor doesn't want to comply.
