Some companies record — and then resell — your screen names, web site addresses, interests, hometown and professional history, and how many friends or followers you have, according to a report released this week. Some companies also collect and analyze information about users’ “tweets, posts, comments, likes, shares, and recommendations.”
technological spying
How Companies Track Your Politics And Assemble Profiles Through the Internet
If you’re a registered voter and surf the web, one of the sites you visit has almost certainly placed a tiny piece of data on your computer flagging your political preferences. That piece of data, called a cookie, marks you as a Democrat or Republican, when you last voted, and what contributions you’ve made. It also can include factors like your estimated income, what you do for a living, and what you’ve bought at the local mall.