Exit 0 means allow
Porting an internal Claude Code safety tool from Linux to macOS took about six weeks, and nearly every failure I found on the new platform failed in the permissive direction while printing a checkmark on the way out.
We billed them for the cleanup
A WordPress site I'd done the front end for at my old agency spent about two months redirecting phones to a sweepstakes page, and the invoice for cleaning it up was larger than a year of the maintenance nobody had ever sold them.