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Possible Duplicate:
How often do captchas appear?
Why does SO think I'm a bot?
Please tone the captchas back down

I have very frequently been presented with the captcha page over the past few months. Since I have a reasonably robust history of participation on StackExchange sites, I'd think it were self-evident that I'm not a bot.

Why do I keep getting hit with the captcha?

EDIT: In the process of asking this very question no less! Post and then, bam, captcha!

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marked as duplicate by John, studiohack, Michael Mrozek, Dori Nov 6 '11 at 5:05

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

    
You mean accused of failing the Turing Test? Passing would mean you do seem human. – John Nov 6 '11 at 3:33
    
I think my thinking was that I'd have to pass the Turing Test to be able to post an answer. Or something. I'm just going to change it. – jprete Nov 6 '11 at 3:34
5  
Jon Skeet submitted an SQL injection, changing the code and presenting all other users with CAPTCHAs, thus slowing us down and protecting his rep lead. Obviously. – Ben Voigt Nov 6 '11 at 3:41
    
Thanks to the mods for pointing out the duplicates that I couldn't find. – jprete Nov 7 '11 at 4:54
up vote 1 down vote accepted

I've noticed the test comes up when you make a lot of edits very quickly -- I imagine there is some heuristic which triggers the test.

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