No, i'm constantly responding to it by pointing out that it is a red herring. If others didn't bring it up, I assure you I wouldn't either. It only makes my argument (freedom of self determination) more difficult.
For some reason people get side tracked on the "Look! Squirrel!" aspect of slavery in discussions regarding the civil war.
If only the southern leadership hadn't repeatedly cited slavery as the reason for their actions.
BS.