So back when I was a PhD student, we had an idea for a Captcha system that would be better than the current system and all alternatives by quite a margin, but w

So back when I was a PhD student, we had an idea for a Captcha system that would be better than the current system and all alternatives by quite a margin, but we talked to some experts in the area, and they said that none of this matters because captchas are normally broken by feeding them to mturkers or people wanting to get into porn sites. Is that no longer true? If so, I should look at reviving our old system.