Re: There's some cruel buggers out there
PETA kills 80% of the animals they get their hands on- most of them healthy and re-homable, and then fritters away donations from well-meaning people on celebrity billboards and publicity stunts.
Meanwhile in the real world, responsible researchers are answerable to in-house animal ethics oversight, as well as funding agencies, the government, Retractionwatch, and the popular media. If you have any evidence that a specific project, particularly one that has just got a media profile, is cruel and unnecessary, lots of people will want to hear about it- assuming you're not just blowing hot air, of course.