Give Me My Electricity Back!

A few weeks ago, I was pulling into the H-E-B for a couple of quick items.  A couple of cars down from me was a gentleman standing in front of his car with the hood open, his car backed into the parking space.  I asked if he needed a jump.  He paused, and then told me he did.  I told him that I would only be a couple of minutes, and if the car next to him left, he should make sure no one else parked there so I could pull my car next to his. 

I was in and out in five minutes, and when I came back, he was still there, and the space next to him was now open.  I moved my car over, turned off my car, and got out my jumper cables.  I attached the cables to his battery and mine.  He then jumped into his car and turned on the engine (with no problem at all). 

The catch here is that my car was off.  I may not be a car care savant, but I'm pretty sure you can't give someone a jump with your car turned off.  It's as if I was wearing a heavy sweater on carpet, and we attached the cables to my hair to jump start his car off of static electricity.

I took my cables off his car and he drove off quickly, without a thank you.  I was standing there, thoroughly bewildered, when I noticed that on the back of his car were some of the most offensive anti-abortion bumper stickers I have ever seen.  Whatever your opinion on the topic, these would have offended. 
"People who believe in abortion should be disemboweled"
"Kill all abortion doctors"
And the lovely picture of an aborted fetus.
[granted, these weren't the exact messages, but the general tone]

I was even more bewildered.  A guy with offensive, right-wing propaganda all over his car who obviously didn't need car help waiting in the parking lot for someone to offer help.

Was he doing some twisted kind of experiment?  Did he see my battered "Obama 2008" bumper sticker and wanted to see if a liberal would offer help?  Was I a part of a double-blind experiment whose results will be published in "Wack-Job Quarterly Review"?

And shouldn't I have to sign some sort of release?