My daughter knows this all too well. She was the " house leader" at a home with 6 recovering addicts. (females). She urine tested them weekly and as needed. She had to ask 2 to leave. They gave her a hard time but she, having been there, done that, had no mercy.

Ironically, she started to use again while she was in that role. She got caught and was thrown out.

I'm telling you she's done it all over all these years.

She can never feign not knowing the rules. Never.