Just to add on a bit, where I participate in a forum on Politics and Religion is mainly about cycling. There is only one topic that just dies, and that is about cycling. There is no discussion regarding that, because we are all cyclist...

My opinion is, that if you really want to make an impact discussing politics, go to a forum where people use conventional farming, etc. and talk about these issues. I promise you that you will get lots of debate, and you knows, you might even do some good.