Ill bump them with my wheel, since i can pretend hey they cut me off and i couldn't stop in time. But hitting them with my hand or lock? no

I've had pedestrians hit my car as they walk by, because im too close to the crosswalk or the guy in front of me slammed on the brakes and so I had to. Often the other person gets mad but has no idea what happened to cause me to brake. Some pedestrians are nuts, hitting cars as they walk by, because they have to go now! They are as bad as cagers.

Just last week while i was biking to work a woman crossed left over the double yellow then swerved back and slammed on the brakes right in front of me (there was a red light she had nowhere to go) then screamed "I have the car!" What am I gonna do? What happens if I escalate it? Pull her out of her car and get in a fistfight? Or worse have her back up over me or try to hit me with her car?

After watching the videos of drivers deliberately hitting bikers (and the Pritzker kid who got away with it here in Chicago a few months ago, though the guy wasn't killed) no thanks. If someone is crazy and/or not paying attention, chances are human life is very cheap to them, and my life is quite dear to me.