Some conservation issues can be discussed without politics. A while back there was a thread about some guys in IL dumping crap in the Rock River. We all discussed it and as far as I know of, it did not get political.
Some conservation issues are bound to get political like "global warming" due to the fact that the two sides of the issue are either you believe one side or the other. Of course, those two sides are divided pretty much by what side of the ailse you tend to cast your votes for and what news program you choose to listen to for your information.
Before you post a thread about a conservation issue, you should think of where it will tend to end up. Will it get torn apart by political lines or will it draw a mainstream approach from the obvious majority of us who fish? If it tends toward the political line, then just don't post it.