Jimmy Wales's clandestine editing of a girlfriend's Wikipedia entry has done more than just bring the online encyclopedia into disrepute. It may well put the site's nonprofit parent, the Wikimedia Foundation, in legal jeopardy. Wikipedia has thrived in part thanks to a protection granted by the Communications Decency Act, which spares websites which merely host users' content from liability for what they say. But what if one of the website's officials moves to have that content edited? Then the protection vanishes. That is the legal argument advanced by Wales's ex, Rachel Marsden, in a series of emails with Mike Godwin, Wikimedia's general counsel, that she has posted to Valleywag.