Why are you messaging a murderer?

If you met someone in the street and they told you they'd just brutally murdered someone, would you want to be their friend? I probably wouldn't. I mean if it seemed like they were serious it would definitely be a bad idea. Even if they were joking it would be a bit risky. I mean who the hell opens a conversation with a complete stranger by joking they'd killed their last boyfriend by feeding him into an industrial food mincer? Well, I do but only in Facebook add me groups. It's amazing how many guys take that as a sign they should inbox me and try to form some sort of relationship. This guy seemed to think it was a good idea but he was a bit tetchy.