Yes, she should have known better having GE. She should have know that an apple on the plane did not come from the U.S. It had never been in the U.S. It was being brought into the U.S. as an undeclared item.
But for heaven's sake, put a trash can behind the power counter and throw away these obviously absent minded mistakes. I don't think we can fully judge intent, but we can get a pretty good sense for it. This woman almost certainly didn't have intent to smuggle undeclared items into the country.