I once used a form with a random math question: 7+2 = __
It prevented 100% of bot spam for years. Granted, I was never a big enough target to make anyone rewrite their bot, but that's the same for most of us. I'd never use a captcha so long as something trivial like that works 100%.
It prevented 100% of bot spam for years. Granted, I was never a big enough target to make anyone rewrite their bot, but that's the same for most of us. I'd never use a captcha so long as something trivial like that works 100%.