If you're scared, get a dog.
Or just read the "Why Should You Care" section and really think about it. Is it so bad? Do they have your gramma's name and address and are they sending the Depends cops over to check if she's peed herself? No, they have a bunch of anonymous data that they never attach to you personally.
Everyone's trying to track YOU? NO, that's just some sort of weird narcissist paranoia on your behalf. Nobody is trying to track YOU. Everyone is trying to track EVERYONE. YOUR information is worthless on its own. NO marketer cares about YOU personally and YOUR data is not worth anything negotiable.
If you're scared, get a dog.