NEW YORK — To see what Facebook has become, look no further than the Hutzler 571 Banana Slicer. Sometime last year, people began sharing tongue-in-cheek reviews of the banana-shaped piece of yellow plastic with their Facebook friends. Then those friends shared with their friends. Soon, after Amazon paid to promote it, posts featuring the $3.49 utensil were appearing in even more Facebook feeds.
At some point, though, the joke got old. But there it was, again and again — the banana slicer had become a Facebook version of the knock-knock joke your uncle has told for years.