I suspect that if a close relative of mine shacked up with someone like that, and if I was worried that he was a ne'er do well who was leeching on her and whose conduct had put her and her family at risk of prosecution, that irritation would turn into something quite a lot stronger.
Nah, it's counterproductive. It's better to take the p** instead.
The business about the still is silly. The Dopeys should say that they want Toby to get rid of it by a specific deadline, and if he doesn't do it by then they will.