dont worry about ca certs... that doesnt means everybody can use the security hole..
Also, according to the iranian guy, some others certs were hacked... so that doesnt protect you...
Well I don't expect them to protect *me* personally, I've been on the net long enough to know not to trust anything remotely suspicious, also I'm good enough to spot them. But perhaps some casual user would benefit from it.
To date, I had never had my PC infected with virus or trojans, all it takes is the practice of caution and avoiding bad neighborhoods