The Wall Street Journal says that Facebook is evaluating how it could use parental control technologies so that it can allow kids under 13 to use its main site. Critics say this could be a privacy disaster, while some have advocated Facebook create a kids-only “sanctuary.” Facebook has no choice but evaluate some kind of kid-safe strategy – it is against its terms of service for under 13-year-olds to use the site, but lots of surveys suggest kids are doing their own work-arounds. Facebook could be unintentionally violating COPPA regulations about collecting data on children. AOL used to have a pretty good business in parental controls, so this might be a revenue opportunity for Facebook. Premium kids-only sites have never really taken off. Mathew Ingram has some analysis, and a poll.