That one random guy asking for ten or twenty packets of ketchup every once in a while isn't the problem. Sure, it's weird, but he does put it all on his fries and he does eat it all, so that's just part of offering free ketchup.

However, would you still call it "detached from real life" if suddenly the manager from McDonalds starts showing up daily, filling a 100-gallon drum with ketchup because it is "free"? In law there is such a concept as a "reasonable person", which exists precisely to avoid people abusing loopholes like this.