"Anti-Muggle pranksters. We had two last week, one in Wimbledon, one in Elephant and Castle. Muggles are pulling the flush and instead of everything disappearing - well, you can imagine. The poor things keep calling in those - pumbles, I think they're called - you know, the ones who mend pipes and things."
-- Arthur Weasley (OP7)
In a spate of Muggle-baiting, Widdershins enchanted the toilets to spew out their contents all over unsuspecting Muggles (OP7). Widdershins was injured and captured when one of the toilets exploded (OP23).