Elgan: Why you can't trust 'friends' on Facebook

Similar to this is stalkers of all stripes who use fake profiles to keep tabs on their victims. There's even a tongue-in-cheek "Stalkers" application on Facebook.

How to wreck Facebook

One reason people enjoy Facebook is that e-mail has become polluted with spam, and it's more pleasant to converse without unsolicited garbage. That's why purveyors of unsolicited garbage find Facebook so appealing as well.

This week, Facebook won an $873 million judgment (filed under the CAN-SPAM Act) against a spammer. Hooray for Facebook! But this high-profile legal victory points to the sudden attention being paid to Facebook by spammers large and small. For every big fish caught, a thousand little fish get away. Of course, the spam on Facebook comes in the form of "groups" and "gifts" and "applications," as well as wall posts and other such communication.

Facebook is also becoming a focus point for hate speech. After a South Park episode where a character claims all redheads are evil, some Canadian teenager created a group on Facebook called "National Kick a Ginger Day." Which led, of course, to actual kids getting kicked at school. This passes for a hate crime in Canada.

In Italy, someone or some group posted a series of "neo-Nazi" Facebook pages that reportedly called for violence against gypsies.

All of these malicious activities, from fake friends to spam to hate speech, are aggressively dealt with by Facebook once people complain. But the Internet is always Darwinian. As Facebook's defenses evolve, the spammers will find a way to deceive. And deception is oh so easy on Facebook.

Eventually, I predict that fraud will become so widespread that signing up for Facebook will require a verified cell phone number. But in the meantime, difficult-to-detect fraud is exploding on Facebook, and you would be well-advised to verify every friend.

Mike Elgan writes about technology and global tech culture. He blogs about the technology needs, desires and successes of mobile warriors in his Computerworld blog, The World Is My Office. Contact Mike at mike.elgan@elgan.com, follow him on Twitter or his blog, The Raw Feed.