Your server becomes part of a botnet. You wake up to find your database erased, your visitors infected with drive-by downloads, or your site serving porn ads. Google blacklists your domain within 48 hours.

Arjun scrambled to his laptop. He opened the script's hidden backdoor—a file named best.php buried in the logs. Inside wasn't code.

Some legitimate "GPL Clubs" offer redistributed versions of software legally under the General Public License, though they still lack official support.