Even if 100% of Paypal -> btc transactions were reversible, far fewer than 999 out of 1000 people would screw someone over like that. I know I wouldn't, but of course, you don't know that. Maybe I'm a very unimaginative criminal, and $36 is the biggest number I could wrap my head around. Maybe I'm just a stickler for details, and that's why I would be especially concerned over exchange rates on a transaction that was going to be reversed. In any case, I wonder if your speculations merited a response at all. Maybe it's some kind of complex? Who knows, let's speculate on more interesting stuff...
Dude_
You seem like a guy with a solid head on your shoulders, so how about we not go into that? Sure, maybe only 0.1% of people would scam for $36, but those are the people that keep creating new accounts and plaguing people with that exact mentality.
So - I get that you might be feeling like @Lassle was way out of line to offend a newcomer like you, but step back and let's take a look at the bigger picture before you lash back out.