No fair minded poster will have any problem with this regulation. Most will support it.
Only the scumbags who perpetrate it will whine.
Scumbags such as you two.
The tabloids are littered with the stories of such prats who’ve caused misery - and often paid dearly for it themselves.
By the way - if you think you’re safe doing it from outside HKG, don’t forget the authorities will be waiting for you next time you drop by.
That’ll ruin your trip no doubt.