On this and other forums, I always look at the date the poster joined when I ask a question and I get an answer. Not that it always means they're an expert, but i figure they got their good rating from somewhere. Usually if someone asks something (like, say, "can I keep a BP in a fish tank?" and if I have experience doing this, I will answer like "in my experience..."
It is pretty bad when people pop up out of nowhere and start spouting off false info; I think that the core members here have a basic agreement on BP care. All we can do is to correct the wrongdoers and give them a bad point, I guess.