@tomcoady We use Google's reCaptcha. If the threat score is high for the IP, then the challenge becomes harder.
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
@tomcoady We use Google's reCaptcha. If the threat score is high for the IP, then the challenge becomes harder.