I don't wrap the eggs in foil...let me clarify.....I wrap each egg in 1/2 a paper towel. place snuggly in an egg carton, tape closed, wrap that in foil and then bubble wrap the whole thing.
I don't see it as any different than the loads of folks who wrap their eggs in bubble wrap and tape up...
don't know if there is or not, but I wrap them when I ship. It can't hurt...if it's right then you've protected them some. If it's wrong, then you've wasted a bit of tin foil. No biggie.