Comment Re:Comodo's certificate extortion (Score 1) 237
No, they don't prevent passive eavesdropping, because they don't prevent impersonation - if you cannot validate the heritage of the SSL certificate presented, then anyone could be presenting their own.
Highlighting self-signed SSL certs as the various browsers do is done so the user does not make the same assumptions about the site as they would a third-party signed SSL cert - because you simply cannot make the same assumptions, and its dangerous to do so.
At least with HTTP sites, people know and accept they are not secure - with a self-signed cert they are just as exposed due to inability to assume the cert is authentic and what the site intended to be used, but you are suggesting they can safely assume they are OK to use the site! Absurd!