It’s really very simple – say whatever you like, but make it productive, and don’t be a jerk in your delivery.
I won’t remove any comments or block any commenters just because they express opinions different from my own. But I will take action against anything that doesn’t contribute to a productive conversation. Don’t jump in and call someone a name because you can’t think of a better argument to support your ideas. That goes for everyone – whether you agree with me or not.
Finally, not that I’m bigheaded enough to think this might ever become an issue, but I’m going to cover my ass just in case: I will post any identifying information I have available for anyone who thinks violence or threats of violence are the way to argue their case. It will go to the police, too, but your fellow cyber-friends deserve to know who’s among them.
So, have fun and don’t be a prick. Thanks!