Heavy artillery, Tanks, Bombs, Guns (except water pistols)
Any torture device ever created….although someone would invent another, and another…
Fake nails, Fake eyelashes
Productivity Monitors
Packaged Cigarettes
Deadly Synthetic Drugs
The 24-hour News Cycle
Paul McCartney’s Holiday Hit, “Simply Haaaaaaving a Wonderful Christmas Time”
Flavored Coffee…. probably the worst abomination on the list.
If you could un-invent something, what would it be?