A check is made that the checkbox has been checked before the comment is submitted so there’s no chance that a comment will be lost if it’s being submitted by legitimate human user.
This plugin really very usefully and accurate protected from spam bots. Setelah hampir 1 tahun saya menggunakan plugin ini. Hasilnya cukup memuaskan, sangat ampuh mencegah spam-robot. Saya merekomendasikan Anda untuk mencoba.
Reference: Growmap Anti Spambot Plugin
Download Plugin: Growmap Anti Spambot Plugin