There's also the possibility that it does happen often and no one notices, of co...

dredmorbius · on Aug 30, 2011

Makes me wonder how you'd approach the "how do I find bad certs" problem.

You'd think that an entity which, say, scrapes a large portion of the Web on a regular basis ... might be able to detect such things.

Meanwhile, there's CertWatch http://certwatch.simos.info/ and The Convergence Project http://convergence.io/