[grundoon]

The thing that really ticks me off about those captchas -- besides that it seems I'm more likely to have them forced on me when I'm on a VPN, so presenting an AWS IP to their server -- is that sometimes they think I'm wrong about, e.g., which square has an image with a bicycle. No! It's YOU, captcha algo, that are incorrect! Your images are wrongly labeled! Grrr, so annoying :-(

[throwawayboise]

I find the requests are often vague. "Check each square with a traffic light" -- does that mean just the light itself, or does it also mean the supporting structure? Also sometimes the images are lacking context. "Click each square with a train" and one of the images is a close up of some metal carriage with a window. Could be a bus, could be a train.