I’m always warning folks about Facebook and privacy. Monday’s WSJ article confirms that Facebook’s sharing of the “User ID” allows other firms to tie a lot of data to your persona. My immediate advice is that you should check your Facebook privacy settings immediately and make sure you’re only sharing that you want everyone to know
By EMILY STEEL And GEOFFREY A. FOWLER
Many of the most popular applications, or “apps,” on the social-networking site Facebook Inc. have been transmitting identifying information—in effect, providing access to people’s names and, in some cases, their friends’ names—to dozens of advertising and Internet tracking companies, a Wall Street Journal investigation has found.