I think they're definitely too extreme, as are their Australian counterparts, the RSPCA, and a smaller, even more militant organisation that I can't for the life of me remember the name of. While I don't in any way approve of cruelty towards animals, such as battery hens, or the case with the pigs mentioned in the other threads, both of these organisations take it to ridiculous lengths. We had a ridiculous case here a few months back where bats were killing Melbourne's 150-year old botanic gardens, one of the city's most important open spaces, and militant animal-liberationists were being rather painful. I don't think the bats have been moved to this day, so we're losing this open space because of these ****s.