I was recently using stackoverflow.com to solve a technical problem. On the site, if you make too many edits or changes in a set amount of time, the site decides you could be a robot. If this happens, you’re asked to complete a CAPTCHA (typing out the text from an image) to confirm that yes, you are human.
Here’s a screengrab of the page:
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This is great! It really shows me where to expand my blog. I think that sometime in the future I might try to write a book to go along with my blog, but we will see…Good post with useful tips and ideas