very reminiscent of Linus Neumann’s Trolldrossel (German for ‘troll throttle’): Depending on the amount of bad words in a given comment, the captcha fails regardless of the answer given. It was installed at a site providing comments for controversial german blogger Fefe when it was overwhelmed with racist, misogynistic and otherwise awful comments.
Here’s the 2013 talk about it, if you understand German.
Hmmm, previous existing works make a patent attackable, no?
Yep, it’d be existing prior art. In NZ you wouldn’t be able to patent this concept at all. They’ve banned software patents. The US really needs to do the same.
Australia needs to do so also.
Only if the existing work is implemented the same as each claim in the patent.