Olives are a massive industry for the nation, and as such, they are a prime target for the food falsifiers. It's so bad that a recent police sting targeting prominent crime families uncovered 85,000 freaking tons of fake olives. How do you fake an olive, you ask? By literally taking an expired one that had gone unsold on the previous year's harvest and painting it green to make it appear fresh and delectable. Since copper sulfate, the substance used to coat them, is not a food colorant, authorities seldom test for its presence; apparently, their major concern is the tint of the foodstuffs, not potential toxicity.
We're pretty sure some of those are peanut M&Ms.
Copper sulfate, by the way, is described as "only moderately toxic" by Cornell University, which is like calling a knife wound "only usually fatal." The reason it's given this moderate status is that it's usually vomited back up before the body actually begins to digest it -- so they probably won't kill you, just your toilet.
Currently, 19 people face charges over the production of these olives, headed by long-time green food forger Sam I Am (or whatever the Italian equivalent of that is).