It's "Redrum" (murder spellt backwards), without the vowels, and jumbled up; so instead of "RDM" or "MDR" they decided that the D, which was common to both, should be the start of the abbreviation. Yes, DRM is short for 'Dr. M,' Doctor Murder.
It really won't kill your kids, just your ability to have new children. In effect you are now a eunuch.