Online Dating Offers Many Opportunities to Hook Up — and to Be Rooked. Here’s How to Protect Yourself.

Katherine Flansburg met her boyfriend through PlentyOfFish.com, a free online dating site. Several months later, they moved in together. Everything seemed to be going well until one morning when they were woken up by a loud banging on the door.

Flansburg, 26, a real estate agent in Santa Clarita, Calif., was shocked to discover that their unexpected guest was her boyfriend’s wife. Moments later, a fuming Flansburg rummaged through her boyfriend’s desk drawers and found recently filed paperwork for a legal marriage separation, as well as an IRS earnings statement that showed her boyfriend’s salary was only one-quarter as much money as he’d told her.

“He was a piece of work,” she recalled.

As long as people have been dating, there have been tales of liars, cheats and thieves. In the Internet age, with the anonymity offered by e-mail, and with people blogging about their bad experiences, it seems like there are more examples of nefarious behavior than ever.

In the pre-Internet days, if a woman wanted to find out about her beau’s background, or if a man wanted to make sure his new girlfriend wasn’t a gold digger, they would have to hire a private investigator, an expensive and time-consuming process. But 21st century daters have new tools that give them easy, inexpensive access to outlets through which they can run background checks on potential mates by tapping into databases and computerized records.