Examples of P2P file sharing includes illegal downloads of movies and music. As mentioned in "Digital Pirates Winning Battle With Studios", in 2008, when the "Dark Knight" was released, more than 7 million copies of the movie was illegally downloaded across the world. Unknown users put the movie on the Internet which is accessible by other internet users who access and download it. A simple google search can bring up a movie available for download (Stelter and Stone 2009).
This is a combination of technology and the internet at play. Because the internet is so open and users are connected via networks, illegal downloads are very common. Not downloading something illegally would actually be strange because no one wants to pay for content when they can have it for free.
References:
Stelter, Brian, and Brad Stone. "Digital Pirates Winning Battle With Studios."
The New York Times. The New York Times, 04 Feb. 2009. Web. 25 Apr. 2015.