Since we're using the recaptcha service (know acquired by Google) for this, we cannot control what gets displayed as the captchas. What we could do is try to make it easier for the users to request a new image if the one they are presented with is not useful / too hard.
Since we're using the recaptcha service (know acquired by Google) for this, we cannot control what gets displayed as the captchas. What we could do is try to make it easier for the users to request a new image if the one they are presented with is not useful / too hard.