Is Britney Spears portraying a negative role model for children?

Now that she has entered rehab, don't you think it's about time we talk to our children about who should and shouldn't be role models? Isn't it right to tell children that even though rehab offers a second chance, you shouldn't have to go there in the first place? Are we just telling our kids that it's okay to f*ck up, because there will always be someone else to help you out, even if you are famous?