I previously thought that no invention could ever be as worthless as the EZ Cracker. That was until I saw the Chef’n Bananza Banana Slicer:

Seriously, does anybody have a problem cutting up a banana? The knife doesn’t even need to be sharp. You don’t even have to use a knife: I cut them up with forks and even spoons all the time! And what is more difficult, slicing bananas, or cleaning between all those little blades on the device? I guarantee that takes more time.
Why stop there? Why not an Automatic Corn De-kerneler

Again, I’ve never really had a problem doing this quickly and efficiently with a knife. And furthermore, how often are you doing it in the first place? The best thing for removing corn from the kernel is my teeth! (Well, I think actually that Oliver’s teeth are the best thing from removing corn from the kernel…that boy eats corn faster than Grandpa Johnny!) (Not really. You’ve never seen Grandpa Johnny eat corn. But I digress…) I don’t know if this thing accommodates different sizes of corn, but I bet you spend more time wrestling with the thing, trying to get it working, than you do with the original “difficult task” of cutting the corn off with a knife.
Link via Sara.