[quote=@LegendBegins]
<Snipped quote by Rai>

You are referring to CAPTCHA, which is already implemented on the Guild. It is rather ineffective.
[/quote]

Maybe instead of captcha have a different tab above the rp sections. But in the same grouping labeled like. 
Roleplays for bots. That is just to catch bots. So that they spam there and can easily be found and deleted. 

I'm not familiar with how bots work but they seem to just pick the first tab they see to post in.