CDA decision may be wrong
IANAL, but, IIRC, section 230 of the CDA only protects the operators of an unmoderated site, or one in which posts are never deleted. Once posts are deleted by the operator without a court order or some other compulsion, you become responsible for content on your site. Of course, apart from the comment about looking like he was being fisted by a large ape, the CDA is not actually relevant in this case.