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Do we actually need it?

It's an annoying verification if we must verify us as a human.
Please make it only once after the verified process.
Further, please delete the weird robotic-human photo on the page.

It's not good for UX.
Hope this will be changed and fixed.

UPDATE: Solved with some explanation.

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What process are you attempting that needs multiple verifications? –  Bill the Lizard Dec 17 '10 at 13:40
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The verification should only get triggered under some conditions - could you edit your question and tell us in more detail what steps you took? –  Piskvor Dec 17 '10 at 13:41
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It's a guard against you using Stack Overflow in the middle of a robotapocalypse. Just because you've proven that you're a human once doesn't mean that a robot hasn't broken into your home, tied you up and has begun editing posts on Stack Overflow from your machine. Stack Overflow must be ever vigilant. –  XMLbog Dec 17 '10 at 16:47
    
Thanks everyone. Only reproduce the normal step to post a question. Okay, I just know it. I'm a new member in here, so I need to ask. @Five So that's what should be happen. Thanks for your explanation. –  mhaidarh Dec 19 '10 at 6:48

2 Answers 2

up vote 5 down vote accepted

Implemented a while ago:

  • a 5 minute captcha grace period. So if you solve a captcha once, we don't captcha you again for 5 minutes -- unless you trigger the extreme bot thresholds.

  • reduced captcha thresholds for 10k users. Once you get to 10k, you have to go much faster to get the captcha.

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Thanks for your information and the tip! –  mhaidarh Jan 4 '11 at 7:40
    
has the policy changed yesterday? today (2011-01-22) i posted 4 replays on stackoverflow.com within an hour and for every relpy i had to answer the capcha. the 2 months before there were only 1 capcha per day as maximum –  k3b Jan 22 '11 at 6:42
    
I just got asked to verify on SO twice in rapid succession. Can't be entirely sure that it was under 5 min, since I like to think before I answer ;) Anyway, I think there could be an even longer grace period. Why even bother to ask for verification again if it´s the same session and from the same IP? –  Jorn Mar 10 '11 at 23:15

And remove it please for trusted users.

I'm a member over a year, over 30K reputation. Am I still not trusted enough not to post spam???

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The system trusts you not to post spam. It just doesn't necessarily trust everyone claiming to be you. –  Jon Skeet Dec 17 '10 at 13:44
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The probability of account hijacking is very low. Handling manually one such case is a small price to pay for much improved UX for the rest of the users. –  user136634 Dec 17 '10 at 13:48
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At 10k reputation and above, you do get drastically reduced CAPTCHA timing. –  Grace Note Dec 17 '10 at 13:50
    
I'm a member for just 2 days. But I feel that's kinda annoying and unnecessary. @Jon Skeet: Oh. So that's how the system work in here. I just know. –  mhaidarh Dec 19 '10 at 6:33

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