He's making a reduction to the absurd to show why the reasoning he is replying to doesn't work. It's a good form of argument, quite similar to a proof by contradiction.
Actually it's your reasoning that's faulty. All crimes are not equal. That's why society deems it appropriate to outfit different crimes with different punishments.
Let's not forget that until mid-20th century, adultery was illegal in most states...
> glitchc: there’s no law broken here. So, how should I feel about this?