Originally posted here by KorpDeath
They tried suing a few companies that did tests on their firewalls. A simple script could crash the thing and it would crash "open", that's not a good thing. ZA contended that they were "reverse-engineering" their code, etc. etc. put a couple of them out of business because of the legal fees.

ZA also has ahistory of not listening to it's users and their concerns.

Eh, they might have changed by now..... yeah like M$ has changed.
I believe ZA is now owned by Checkpoint, my experience with Checkpoint has been very positive, so maybe they have changed.