There's a guy who had the HSUS come in and confiscate his 172(I think) dogs, even though the HSUS rep said on record the dogs didn't look bad, and the official inspector had been there TWO DAYS before and said everything was fine. The judge has since ruled that the dogs were taken illegally, but something like 34 dogs have died while in the care of a rescue(of PARVO!!!! What rescue doesn't take precautions against parvo??).

So it does indeed happen. Especially when any AR groups get involved, either in presenting evidence or making accusations to actually showing up and taking animals illegally.