One need not know what DRM is to be prevented from viewing content by it.
Many of my friends and co-workers have used iTunes in the past. Several of them stopped after catastrophic software failure or other calamity in which iTunes DRM keys were lost - preventing access to the hundreds of dollars of music they'd 'purchased'. Of course, when such things happen, these folks come to their friendly local computer guy, and we tend to show them the easiest way to replace all those music files - already bought and paid for - Arrrrr!
And that's how DRM fails - even for normal people.