You're right. Your way will make a more lasting impression. I used to wonder why hoods would punish a man for stealing even a small amount of money, till I grew up. A man who'll take five dollars from you will also take five thousand or five million. If you catch him and let him go, you have made an enemy on the loose and as Blackbeard said,'You should never leave an enemy behind you.'

OP. people who do hard drugs are a waste of space on the earth and there is never any benefit to you in having anything to do with them. If a man uses the stuff at all, never mind a habit, he is not fit company. If he even ever did use them in his life, that shows a weakness of character that no doubt includes other vices you haven't seen yet. Always have zero tolerance for other people's vices - you'll have enough to put up with controlling your own.