I definitely sympathize with people who worry about the ethics of consuming meat and using animal products. Factory farming is disgusting, and we do need to improve our systems for large-scale food production. But I would never go so far as to say that all animal-based foods and products should be banned.* The work performed by Natalie Cairns-Ratter of the Shetland Tannery, discussed in this interview by Kate Davies, is a wonderful example of the beautiful connectedness that comes from being appreciative and respectful while using every part of the animal.
*If anything we should just ban humans; I have an affinity for the goofy Voluntary Human Extinction Movement.