I don't like DRM in the consumer world, DRM'd media files, games, etc. I agree with all the arguments against using DRM there. Criminalizing decryption is a travesty of justice.

However, there are entirely different contexts where DRM can be a useful tool. For example, in a past job, my company was receiving a sensitive data feed from another company where we had to promise to revoke our internal access to certain parts of the data feed upon demand. We were not worried about internal hackery, but we were worried about inadvertent copies being made within our enterprise for reasonable reasons. (Backups, caches for speed, etc.) We self-imposed DRM, and it was a great solution.

Having such an easily game-able criteria (boisterous people get more investigation) yields more success rate for those who don't want to get investigate. The al-Qaeda training manual suggesting blending in is an obvious reaction - while the security spends more time on some class, they have less time to spend on the class the terrorist can put themselves into. (Quiet and blending in.) Thus, this actively (slightly) increases the chance the terrorist can achieve their goals.