Since 13:18 UTC, the install page for cPanel/WHM and Plesk starts with what the script does in plain words. It only reads, and sends us only the list of sites. It never sends files, mail, databases, passwords or your customers' details, and one command removes it. For WHM resellers the page adds that your WHM token stays in your account on the server and is never sent to us.
Disconnect now says what really happens: the server's key stops working at once. The page then shows the command that removes the script. With root, that removes the three files. As a WHM reseller, you remove the crontab line and ~/.pingwise, and revoke the token in WHM.