As its still in development, I’ve set the drag n’ drop captcha mechanism to report failures in full as well as forwarding legitimate responses.
I’ve had the first (update: two now) such failure notice from a live installation today – subject line: ‘yGAQJUnxHNOw’ and just a few web addresses I won’t repeat here.
Positive so far.
I finally have this released into production environments which will no doubt help me to improve it. There’ve been some updates to the mechanism to dissociate image filenames from the puzzle fields.
Next I need to make the names more variable, and perhaps cache them and generate random permutations. Accessibility remains a concern.