I'm a born and raised Philadelphian, so I must chime in here and say that scrapple is the absolute worst "food" you can ever imagine eating. Even if you don't think of where the stuff comes from (think about the root of the word "scrapple" and imagine where "scraps" of pork come from) the stuff is just terrible, ketchup or not. There's probably a reason the Philly cheesesteak and the Philly soft pretzel have migrated elsewhere, but scrapple hasn't really caught on anywhere else...