What I mean is, hackers (not malicious ones) have something to say about social-networking sites. Thousands of them gathered at two conferences in Las Vegas this past week, the Associated Press reports. Here’s the important part: Hackers are seeing intruders in social-networking sites who “commandeer personal Web pages and possibly inject malicious code.” They look for flaws in sites’ code that allows them to “inject” their own malicious code into pages. This is ” a particular problem for social networking sites, where it’s difficult to police the content of the millions of posts each day,” according to the AP. The intruders often add links to Web pages in other sites that steal the computer “cookie” information from the computer of the social networker who clicks on the link. Particularly vulnerable are people who use older versions of Firefox, one of the AP’s sources said. The source said Facebook and MySpace patch flaws they find, but there are probably hundreds of flaws like this and it’s tough to keep up with what’s on tens of millions of pages. So the take-away is: Everybody needs to keep their browsers up-to-date and be careful about what links they click on in profiles and blogs!