BuiltWith blocks many email addresses from registering, implements scare tactics
Outlook, Hotmail, Yahoo, AOL, iCloud, Mail.com, and ProtonMail emails are blocked. The ones that I was able to get through the sieve were Gmail and Hey.com.<p>Also, if BuiltWith detects multiple accounts made with the same IP address, they show the user this notice designed to scare them:<p>&quot;Fraudulent Account
We think your account may be fraudulent, all IPs you have used to access our site and contact us will be used to investigate any crime that may have occured [sic].&quot;<p>Site also shows badges of the Russian police and the Chinese Criminal Investigation Bureau.<p>Screenshot: https:&#x2F;&#x2F;i.imgur.com&#x2F;agFL4wA.jpg