Animals aren't property, and the law generally finds it acceptable to use and kill animals for human gain, imposing prison terms and steep fines on large corporations-who have even larger lawyers-is rare.
Corporations, government entities and media conglomerates-fear the ideology of an animal liberationist could catch hold and topple them from their golden thrones, reducing their animal product profits.
Anybody can claim to be a member of the ALF when rescuing animals, destroying "tools of torture" (such as research equipment) or financially depleting a corporation that abuses animals.