Being a parent isn't easy, and there's no fool-proof guide to being a great one – but there's definitely more than a few things a parent should never do, like, ever.

For example, it's not in a child's best interest to smoke weed in front of them or not change their diaper. Sadly, some celebrity mom and dads never got the memo.

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Click through the gallery to see celebrities who have been accused of being a bad parent.