Forum Suggestion - Fake bots threads

Hello,
we're seeing recently some useless disgusting threads being posted by bots/crawlers advertising their shit
everyday you wake up check forum you see 4-5 of these threads and probably staffs are tired of removing it

i have an idea to prevent bots from posting so as we can see there's no captcha, the soluction is by adding a captcha form, i recommend ReCaptcha bots won't be able to bypass it 
Frosti forward this suggestion to killer