Yeah, I was thinking, wouldn't this be really easy to bot?
Yes, and impossible for people to fill in. Therefore, whoever manages to find the band correctly must be a bot. Mission accomplished.
I had this sort of idea years ago for a Captcha method, and someone had mentioned this exact scenario.
If you scroll to the download section you can see that the captcha check is completly client side. The bot won't even notice there's a captcha unless they're executing js.
It's 2015, bots use headless browsers.
exactly, this is the first thing that popped into my mind as well