GDPR could be a concern if you are not able to opt out of automated processing. Deciding if you're a spambot or not is a huge decision for a robot to make. To

GDPR could be a concern if you are not able to opt out of automated processing. Deciding if you're a spambot or not is a huge decision for a robot to make. To be fair, any captcha would have this trouble, but an entirely invisible one would not be able to be questioned