As much as I hate to admit it, I've done exactly that and passed the audit. Certainly says a lot about the auditors...
Compliance auditors are mostly there to underwrite posture, not actual risk.
Just as financial auditors are only confirming that your financial statements match what your accounting department tells them.
If you lie to your auditors, there's a good chance they won't catch it because that's not what they are looking for.
There's no audit checkbox for "WAF actually does something useful", so it's fine.
Security auditors are (quite literally) accountants.