Yes, it is very different.
The difference between shooting up in taco bell, and shooting up in your house is the chances of getting caught. If a parent wants to use very sparingly in the privacy of their own home, while their kid is being watched, then I don't mind that much. I also don't mind much if they have a sitter over and are using over at a close friends house every other month. But once you are using in public places, that increases the risk of getting arrested. If a parent gets arrested, that definitely negatively affects the kid, since they can't watch the kid, and will have a lot less money after getting it all sorted out.