Patent ID: 7797421

Claim:
A method, comprising: detecting, at a client computer system, an adverse content event corresponding to a given one of a plurality of network information sources, wherein said adverse content event occurs dependent upon activity of a given one of a plurality of users with respect to said given network information source; reporting, from said client computer system to a remote computer system, said adverse content event with respect to said given network information source; detecting, at a client computer system, a reference to another network information source on behalf of said given one of said plurality of users; in response to detecting said reference, retrieving, by the client computer system from the remote computer system, an indication corresponding to said another network information source, wherein said indication is determined dependent upon a weight for said another network information source calculated from a plurality of previously reported adverse content events with respect to said another network information source that were previously reported by a plurality of different client computer systems on behalf of others of said plurality of users; and dependent upon said indication, notifying, by the client computer system, said given user of possible undesirable content with respect to said another network information source.