Hey Pleonastic, thanks for reading my rant.
You asked
"Does pantheism involve vegetarianism? Are you yourself vegetarian? Does the religion distinguish between the rights of animals and the rights of plants?"
I can't speak for any other pantheists (never met any), and it's not a beleif system where you have to follow any rules. But as I understand there is some disagreement on this point between other pantheists. I haven't heard the arguments but I would imagine they would go thusly-
1) We have total respect for other creatures and therefore we should not eat them
and
2) Eating animals is part of the food chain and has developed naturally so it is a natural thing to do.
Personally I was a vegiterian for a few years but I really lacked in iron and eventually I decided seemed silly to deny my body the things that nature had intended for it to consume. I do feel sorry for the animals that die for me to eat, but again that is part of the circle of life, animals eat each other and die and get eaten by other animals and so on.
As for plants, I guess that is a tricky one. Pantheism is sometimes called Scientific Pantheism as it totally accepts scientific discoveries as telling us more about our facinating universe. Science so far does not seem to think that plants have the same feelings as animals, so therefore it is probably not too bad to eat them. I also think that again it is just part of nature which I have huge respect for. It has developed amazingly delicately balanced ecosystems over millions of year that seem to work just fine, with you eating this plant that pollinates in your hair which is picked up by bugs which are eaten by frogs or whatever and so on. The bottom line is we have to eat something. We have to build our shelter out of something. We have to get warmth from something. And what else do we have but what nature provides? I think you have to try hard to respect other things and I know as humans we do a lot of really horrible things to ourselves and other animals and the planet but I am a selfish human and I do really enjoy who I am and what I experience. It is easy to get bogged down with guilt over what is the right thing to do but I think you have to try to do the best within reason, deal with it, and continue to experience all the wonderful things that we can in this form on this amazing planet.
Hope that made sense