Norton is evil...I've never had a computer that did not do bad thing...like die...while using Norton. (This comp right here was actually killed BY Norton...Okay, so it was a corrupted version, but still...)
-Twilight Storm | My life for the Dahkri
I use to believe as you do. 20 years ago, I swore by Norton (they helped us with an agency wide infection of Dark Avenger). But then they got bloated, buggy and slow! They have now seemed to have turned the corner.
However, if I was not "given" it for free (from Comcast), I would use AVG or if I bought, NOD32.
Back to the topic, While McAfee is going to get a lot of bad press on this, the fault lies with the organizations. first rule of IT - test the updates! Corporate editions allow the administrators to stage the updates. They should have a few test machines lying around they could have tested this on first, before blowing it out to all their workstations. And SERVERS!
Why did they not? I can see 2 reasons. One, they were just lazy. After all, McAfee NEVER released a buggy update or DAT file before, right? (WRONG) Or 2, newbies. Book learning is fine, but there is no substitute for experience.