Because it is their responsibility and constructed ignorance is not an excuse for "mere mortals" it is reasonable to demand the same standard apply to them.

A bartender can't claim they didn't know the cient they served from behind a screened conveyor belt was too drunk. Thus the law should either allow the same sort of bullshit loopholes for all (a real headache) or they should be held to the same standard.

rayiner said it was guaranteed, not me. I was just following up on his claim.