Found this gem in the "Reports: How do they work?" article

_“Your mom” jokes vary by territory, too. In English speaking territories, “Your mom” can be silly or mean, but in Korea, “Your mom” is always deeply offensive. So keep that in mind on your next swing through Seoul. _

So hear me out.

The game is balanced primarily around the top percentage of players, mainly professionals.

The professionals are mainly Koreans.

Koreans find "your mama" jokes deeply offensive.

To balance the system around the professionals, as the game is, all "your mama" jokes should warrant a permaban.