明星做广告能否守住道德防线的英语书面表达

Will stars keep the moral bottomline when they are engaged in advertisement?

could they keep Moral bottom line of stars advertisement?

These days,many famous people have felt worried and sorry for playing a role in some advertisments ,such as Sanlu , one of the best known domestic manufacturers of milk products in China. sanluThe scandal involves babies falling ill across the country with kidney stones after consuming Sanlu baby milk.
In my opinion ,these affairs have no relaitions with huamn's morality .I think these behaviors just belongs to businese.If there have to be somethings about morality,that is the payment from these person who gained form the factories and stores which produced these bad products.