it's not for blts or fries though, it's for straight up tomato bagelwiches - sliced open and loaded up with tomatoes, mayo, hot sauce, salt & pepper to the point that one requires a fork and knife. i'll argue that this is actually a very healthy lunch, given that the mayo is the only discernible fat content in it.
i think that a lot of people have been brainwashed by a lot of years of poor science that suggests that mayonnaise is somehow unhealthy; they're really passing on an urban myth that was likely taught to them by their mothers.