Never

because

"You can't be right by doing wrong; you can't be wrong by doing right."

Thomas S. Monson

Wrongness can never be changed into making right. For example vaping, it is a substance that is another way of people getting  their nicotine addition. They made a lot of flavors targeting towards children and young people. It leads to the same addictions and it is worse because of the added chemicals.The removal of these substances is the only right thing to do, there is no second better option, all of it leads to harming your body, mind, and spirit.