I have to say I know exactly what the author means.
When I visit a site (like BetaBrand) and all of a sudden start seeing their ads in my Facebook feed, it feels unsettling, even if they are just using the cookies temporarily stored on my computer.
I went to Rackspace.com based on a HackerNews article a couple months ago and I'm still bombarded with ads for them on every site I go to.
Why do you think this? The company that I work for uses remarketing, and it actually works really well. I don't know the details behind it, but I know that it's a good source of leads (at least for my company).
Keep in mind that it might not work very well with you, but HN readers don't exactly represent the majority of web users.
The web felt less creepy now.
https://chrome.google.com/webstore/detail/notscripts/odjhifo...
Why? If you have a Facebook feed, then haven't you already signed up to be spied on?