Using a paid software without a valid license is a violation of the Terms of Service and copyright laws. For professionals, using pirated software can also lead to compliance issues at work.
Legitimate network tools are frequently repurposed by attackers for malicious scanning; using unofficial versions may inadvertently install tools with backdoors. Top Free Alternatives Netscan X License Key Free
A popular, fast, and free network scanner that doesn't require a license key. Angry IP Scanner: Using a paid software without a valid license