Matt, you are really going overboard with this:
"Sure, they can reply with unsubscribe, but then you've got their IP address. Who knows what you might do with that. You were distasteful enough to steal a list, why not play with IP addresses, eh?"
I can't believe you are serious here. Is your idea of a good time trying to raise peoples ire? First, I didn't steal the list, I am list member and it was e-mailed to me. Now you are trying to insinuate that it is dangerous to let others know your ISP's IP address! You know better than that. Every website you visit has access to your ISP's IP address, everyone you e-mail has it also, there isn't any danger. You know that. It is a red herring, IP addresses are not the issue. You are just trying to irritate me. Why would you try to irritate your own customers? Pretty weird if you ask me.
You are really making a mountain out of thin air.
Once
The best way to convince a fool that he is wrong is to let him have his own way.
~ ~ ~ Josh Billings
