Or, the perils of distributed law enforcement: Livejournal, a popular blog/journal site, was apparently targeted by a group with the laudable goal of protecting children from predators, but a sloppy and censorious method. [ETA: See comments for other possible goals of the group.] The group thus reported Livejournal accounts with "interests" (a category of profile information) relating to pedophilia to Livejournal's abuse team. No doubt aware of current controversies over MySpace and the like, Livejournal decided that the reported accounts had to be suspended. According to the explanation offered by the abuse team, listing illegal interests amounted to inciting illegality, and put Livejournal at legal risk. (Even with respect to child pornography, where government has huge leeway, this seems like a misstatement of US law to me, but (a) I'm sure it's different elsewhere, (b) it's understandable for Livejournal to be vastly overcautious on this point.)
Result: some very skeevy journals are gone, along with journals of rape survivors, journals maintained by people playing villains in online text-based roleplaying games, and a book group dedicated to reading Nabokov's Lolita. (On this last, I had to play a bit of a trick to get Google's cache to work; I kept getting redirected from the cached page to the current page, which says the account has been suspended. Does anyone know what's up with that? I thought Google either cached or didn't, depending on the robots.txt instructions involved.)
Another collision of user-generated information with the corporate form that often enables it, which is ordinarily invisible. When the corporate minders do intercede, the results can outrage and astonish the affected users.
[ETA: Per comments, Livejournal has attempted some damage control.]