What they DO do is file frivolous law suits, picket veterinary association meetings, support breaking-and-entering and vandalism of research facilities and pet stores, and spread lies about what veterinary students are required to do in school resulting in a serious difficulty getting animals to learn to neuter when I was in school (bad enough that we had students bringing in their own pets for labs!).

Their mission is to eliminate all use of animals by humans. ALL use. Guide dog training is slavery. It is cruel and evil to force my pony to carry me up that hill. Though it looks like they've re-written their mission statement as published on their website so that they can hide some of their extremism from first glance.