Gravity Forms Blocklist is a Gravity Perks add-on that validates a field’s value against the WordPress Disallowed Comment Keys. Set it for a single field, several fields or every field in a form. A field that fails shows the user an error saying it contains disallowed words.

Blocked words go in WordPress Settings > Discussion, one per line, and you use the same blocklist for comments and forms. Add IP addresses to block submissions from them, including whole ranges in CIDR notation. A honeypot option rejects entries silently, without telling the user they were blocked.

Use it for field-level policy enforcement, reserved username restrictions that protect admin, staff and brand-sensitive terms, and blocking leaked, expired or unauthorized promo codes.