Comment on Ask YC: Sign-up Form UsabilityparentComments−johns18yafter N tries, don't lock them out, use a captcha or something else. lock out policies enable anyone to launch a denial of service attack on your site for every one of your users they know email addresses for.
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after N tries, don't lock them out, use a captcha or something else. lock out policies enable anyone to launch a denial of service attack on your site for every one of your users they know email addresses for.