Why would a bot submit a sign up form with fake info?
56839
Why do bots search for / fill and send contact forms?
142056
Why is the recent questions feed showing code?
972
Gmail "suspicious sign-in prevented" message - is it legit?
105134
Why isn't the username obfuscated as one of the close-voters once the user is deleted?
140528
How to Prevent SPAM without CAPTCHAs or a Centrally managed system (e.g. akismet)
62695
Is this character being impersonated?
19485
Fake Links Showing up in Google Webmaster Tools
144386
Fake News Detection problem
73820
Cookies and JavaScript for teststackoverflow.com — legitimate?
92353
Pressing Enter in comment box unexpectedly submits form
10503
CAPTCHA not displaying on "Human verification"
76435
ValidateCredentials returns true for unknown user?
121761
How to disable Gmail's login verification "There's something unusual about how you're signing in."?
96946
I'm getting "Your post appears to contain code that is not properly formatted as code" when there isn't any code in the post
118043
How to prevent robots from automatically filling up a form?
158403
How to avoid getting spam through a website?
124902
Protect email addresses in the user description from bots