Add responsible use warning to README

Author: thebenignhacker

README.md

@@ -29,6 +29,10 @@
 
 Part of the [QRAMM (Quantum Readiness Assurance Maturity Model)](https://qramm.org) toolkit, developed by the [Cyber Security Non-Profit (CSNP)](https://csnp.org).
 
+> **⚠️ Responsible Use Warning**
+>
+> This tool performs active network connections to analyze TLS configurations. **Only scan systems and domains you own or have explicit written authorization to test.** Unauthorized scanning may violate laws and regulations in your jurisdiction. The authors assume no liability for misuse of this tool.
+
 ### Why Quantum Readiness Matters
 
 - **Harvest Now, Decrypt Later (HNDL)**: Adversaries are collecting encrypted data today to decrypt once quantum computers become available