They just said "illegal" artwork, they didn't stipulate. (So this could be incest, bestiality, loli, etc, etc.)

Why would cultural acceptance matter? Classifying drawing something - regardless of what it is - as a "crime" is ridiculous.

Like, for example, I don't like rape (or strangulation, something else they'll start arresting people for now since they recently made it a crime), but I don't want to see people jailed for drawing it, or jailed for looking at anime/drawings/manga/visual novels of/containing it.

I'd rather see people who actually abuse, exploit or cause general suffering to another human being arrested and jailed.