I've started to see a Cloudflare CAPTCHA when I post.

1) It doesn't say why.
2) It's annoyingly HUGE.
3) It demands on the preview, then demands again on the post.

Is this intended behaviour? I'm on the same IP address I've used for weeks (I haven't rebooted my router or modem for a while), and I can't believe that the machines I have running are sending spam or anything - they're either Linux or I just finished installing the OS on them.

Is anyone else seeing this?

(P.S. I didn't see it on the preview here, if that helps at all)

BW