OP, how skilled are you at close quarters combat? When you open up to swing that ice pick, I may just poke you with a quick jab to the larynx effectively cutting off your oxygen supply - either permanently or long enough for you to pass out. Baseball bat - same thing. I can easily step inside the swing, making it all but useless, and maybe grab your arm and break it at the elbow while I'm in there. Unless you train with these items - as weapons - a somewhat skilled close quarters combatant will take them away from you or disable you while you're trying to use them. Now, the average crack head may not be able to do that, but they also wont feel pain like a "normal" person if they're drugged up. You'll have to focus on disabling them not just hurting them. Cliff's Notes: Most people aren't skilled enough to use "melee" weapons in close quarters combat.