Problem
The robot dialogue (captcha) presents itself if you
- Compose a post on a site you haven't logged into without submitting the post
- Log in
- Submit the post (it's already filled out since Stack Exchange kindly remembers the content of the form)
- Be treated like a spammer because while step 1 may have taken many minutes, step 3 took less than a second, thus you must not be a real person
Please consider adding a rule to the captcha that notices if the user followed the sequence enough time spent on an answer post
then login/register
then insufficient time spent on an answer post
I know it's not trivial to fix, and it's probably rare, but it's the right thing to do.