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ALL of the foil?
Take a second to understand that CR used percentages to make sure their results sounded super bad. 
Baseline for lead was 0.5 micrograms per ounce, or 0.0000005 grams going by California's standard.
Toxic levels in children are around 10 mcg/dL or 0.00005 grams per liter. For adults, it's around 25 mcg/dL.
You'd need to be eating a lot of chocolate for it to be a genuine concern. 
Average adult blood volume is 5 liters, so 50 deciliters. You'd have to ingest nearly 950 ounces of Hershey's (the worst for lead) in one go to reach toxic levels. And that's assuming 100% absorption. 
So, sure, regulate allowable levels, but let's not go crazy here. >

The lawsuit stems from a Consumer Reports investigation where they tested a bunch of different chocolate brands (28 brands, I believe) to check their lead and cadmium levels.
Other giant chocolate brands were included in the testing, not just Hershey.
After reading the original Consumer Report test results, we've thrown out all the chocolate in our house. >

You would need to eat an exorbitant amount of chocolate for an extended period of time for it to be an issue. >

In case you're wondering: yes he was unwrapping the metal foil before eating them.