I know a number of vegans. Some by choice and some by various medical issues. They all seem to enjoy themselves and what I have tasted of plant based food has been excellent and very tasty. Excluding vegan cheese;-) While being an omnivore myself, I can appreciate that my food choices are not for everyone and there is a good argument for reducing animal based products. When I was brewing I never used finings. You just need to either pour carefully or accept cloudy beer!