Haha very cool. I remember that thread specifically.
It's been my experience that ZA can only be blamed when the 0x7F errors specifically show netio.sys involvement. When the crashes do not, I can't remember any cases where ZA was eventually to blame in the long run.
To sum up what I'm saying, the only reason to blame ZA is when netio.sys is shown, or any ZA component itself. Without these things being present, you could be fairly certain it's a good thing to look elsewhere at the cause.
But then again, it is a 0x7F error were dealing with in this thread. For that reason, I recommend removing ZA after updating drivers and removing AVG if it is then still necessary.