Answer:
In no specific order, here are the Worst Inventions of the past century —
The Detachable Dog Sack.
The Cat Wig.
iPhone Fingers.
The Pedal-Powered Wheelchair.
The Inflatable Dartboard.
iFlyz Portable Media Player Airline Holder.
Battery-Powered Battery Charger.
Segway
New Coke
Clippy
Agent Orange
CueCat
Subprime Mortgages
Crinoline
Nintendo Virtual Boy
Farmville
Hydrogenated Oils
Honegar
Hydrogen Blimps
Hair in a Can
DDT
Auto-Tune
Red Dye No. 2
Ford Pinto
Parachute Jacket
Betamax
Baby Cage
Tanning Beds
Crocs
Hula Chair
Foursquare
Pop-Up Ads
Phone Fingers
CFCs
Plastic Grocery Bags
Bumpit
Electric Facial Mask
Sony CD Copy Protection
Venetian-Blind Sunglasses
Pet Spa
Pontiac Aztek
Snuggie for Dogs
Mizar Flying Car
Asbestos
Olestra
Comfort Wipe
Fake Ponytails
HeadOn
Pay Toilets
Tamagotchis
Leaded Gasoline
Vibrating Ab Belt
Spam E-mail
Smell-o-Vision
Smile Checks
Microsoft Bob
Vio