I realize this may be satire (Poe's law and all). But I disagree 'hamburger' should get protected status, in anything except the exact quotation without clear prefix/suffix. "Vegetarian Hamburger" (in near-equal font pt) should be fine, Veggie-burger shouldn't even be up for debate imo.
If fine-print is confusing consumers maybe we should improve our labeling standards rather than protecting a food category not in need of protection.