I like the QR-code and the NFC tag captchas since they can really make so that you have to leave your bed. But there’s a problem if you forget it on when spending your night away from home and haven’t brought those “Checkpoints” with you.
I would really find it neat with the ability to add a backup captcha, so that it first asks for QR and then for (say) the shake.
Probably by pushing a button in the captcha mode, like this [Use backup CAPTCHA].
support conversation with Victor