It has its place. I'll admit I'm slightly hesitant because the Off-Topic area was often where the most moderation was needed (for problem posts, inappropriate topics, etc.). But if people are willing to keep to the rules even in an off-topic thread it's fine!
I just had a thought: maybe it could have a different name? "Other Birding Topics" or something more catchy? To help emphasize that it's not for political discussion, attacks on people's lifestyles, etc.