Re: Massive facepalm
That's correct. De facto.
They are a charity, and their "officers" are civilians who have zero extra rights or legal powers than you or I. They do like to pretend otherwise though, and nobody wants to point this out because the RSPCA is all about the cute fluffy animals, ain't it?
tl;dr: Animal abuse is bad, but so is pretending to be a police officer.