Maybe you just don't get the reference, but How To Destroy Angels was the name of the first single from Coil - one of the most influential bands in industrial music.
Trent has long been a fan of Coil, including having them do some NIN remixes for the Fixed and Further Down The Spiral eps, as well as signing them to Nothing records at one point.
So while the name may sound ridiculous to you in 2013, there is actually a lot of history and meaning behind it. If you have any interest in the influences of what I presume is one of your favourite artists, you should definitely check out Coil. A very unique and innovative band, quite unlike just about anything else out there.
Also, the song in question:
How To Destroy Angels