hey but u know what would be more fun that letting them be? here I thought this one out.

U take their mom and someone else close to them and put thme both in a glass container that is attached to a tank containing NO2 gas. now make sure u don't turn on the gas and u bring ur friend into the room (by the way this is a knock off of Batman and Robin and is what 2-face does). so u tell ur friend "look at the table next to u. do u see the bong? I want u to light that bowl and finish that bowl, and when ur done i will pack another one. If u don't then first ur mother will have her clean air mixed with NO2 a highly toxic gas. If u refuse to after this loss person B will soon die as well. Now u have ur choices, and i think I know what u should choose."

And that is the end of the procedure to get ur friend to smoke. have fun with that one