"The worst website of them all is Dictionary.com, who send your browsing data to 234 different trackers. Other particularly invasive sites include Comcast.net, Photobucket.com and MSN.com."
It has a list of top 50 sites. You can click on any site in that list and see what that site may be exposing.
Other high exposure sites include: merriam-webster.com and careerbuilder.com
The only site in the top 50 list that apparently gives you 0 exposure is wikipedia.org
Kudos to Wikipedia!