According to you, "snitching" is apparently worse than using fucking meth.
Shut the fuck up.
No, it just makes the problem worse rather than corrects it.
TC could have helped said friend. Instead, said friend now knows never to trust TC again.
My advice would have been to be supportive and try to convince them not to. Not make things worse and probably stir up all kinds of shit in their personal life. Now said friend's life may be worse because of constant arguments with his parents due to them no longer trusting him.