Off topic:

I have a question for you Internet gurus. It concerns privacy. The world wide web seems to be getting smarter by the day. Uncomfortably so.

I was just watching a bunch of guitar solo videos on YouTube. (Joe Satriani is a God)

A few seconds later when I log on to this site I get ads for guitar lessons. That can't be a coincidence.
How does APC know what I've been watching on YouTube? Does every website that I visit see from my history every other website that I've ever visited?
I thought that cookies were only used by the website that puts them on your computer. I know that my Internet service provider obviously knows every site I visit and I don't really care, but can every website see where I've been?
When I log onto DeltaNet can they see where I've been? I may not want my employer to know that I recently searched for left handed lesbians mud wrestling on spring break.

Is there a way to stop all these people from tracking me?