I've never had much use for blacklists. Most spammers don't use valid email addresses.
Times change. Political parties and candidates do use valid email addresses, and they are spamming me like mad. Oh what a fool I was to give my email address along with money to various democratic party candidates. (Lash, lash, lash.)
This guy is typical: spam email with no way to get off the list. Of course he won't get my money, but he's a fringe candidate anyway.
So now my blacklists and bounce tools will get a workout. It's nice to know blacklists are good for something.