XP

It is way too easy for humans to massively screw over another human being. It's as simple as poking a pin needle into a strawberry. It should be scary how easy it is to sabotage food at a supermarket.

(Halloween is also a perfect example of a large scale trust test)

Sometimes, the "dangers" aren't even meant to be dangers. Layered cakes often use dowels, a wooden or plastic stick, to hold the layers together. The danger in this case actually comes from stupid friends who might believe that smashing your face into the cake is hilarious.. A very easy way to lose an eye if unlucky.