Yes. I wouldn't put much of anything past them. They probably thought Black's Paralysis was just a BRILLIANT idea, too.

Geoff says his brother hasn't been quite right since he got sacked by Mr Malfoy. I wonder if he was being stalked by them -- you know, since he had been Mr Malfoy's clerk. Apparently their mum seemed to think it was afteraffects from cruciatus (Mr Malfoy was really cross with him. REALLY cross) and nagged him to go to St Mungo's days ago but he wouldn't do it.