How to destroy your life and business by computer

One line of code ended a man's business.
This is a teachable moment.  All of his back-ups were connected full time rather than making some periodic firewall backups that were distinct, separate, and physically disconnected from his system.  Had he done this and put them in a safe physical location it is possible he would have only lost a day of data, but not the whole thing. 

What to learn.  Even if you have real time ongoing backups and remote backups you should have a periodic, even weekly or monthly, a periodic backup that is connected and disconnected and put in a safe place.  If you're not willing to do that then the risk of total loss of data is in your future, especially if your system is hacked.