Google wants to protect users from repeatedly dangerous sites

Google announced:

"Since 2005, Safe Browsing has been protecting users from harm on the Internet, and has evolved over the years to adapt to the changing nature of threats and user harm.

Today, sites in violation of Google’s Malware, Unwanted Software, Phishing, and Social Engineering Policies show warnings until Google verifies that the site is no longer harmful. The verification can be triggered automatically, or at the request of the webmaster via the Search Console.

However, over time, we’ve observed that a small number of websites will cease harming users for long enough to have the warnings removed, and will then revert to harmful activity."

Read about the result of this gap on the Google Security Blog