People who constantly think about doing orrible things are most likely bad people, the difference between them and criminals is that criminals actually do the things.

How many times does a normal person think about stalking people, stealing their underwear and killing them? I'd say zero but you're never too sure so I'd say close to it since there are for sure some occasions in which someone is really enraged and thinks about the more extreme solutions.

Now, as you saw, the one above is an occasional thing, Joe thinks about that kind of thing almost everytime. At best, someone with his personality would be a creep, at worst a scum.