What is one invention you believe humanity should immediately stop using?

#29
Gary Larsen made a comic image. Probably copyrighted, so I'm not showing it. You can find it with an image search for:
gary larson heaven harp hell accordion

#30 - How about a musical monstrosity...However it's good for a Polka Dance party - :]
#31 - “Welcome to heaven, here’s your harp. Welcome to hell, here’s your accordion.” Gary Larson - :]

Excuses. :).

anti-personnel mines

The one that reads this.
Ecept all dictatators or other things that are not human like me.

Factory farms that supply meat in vast majority of supermarkets and restaurants, where animals are tortured in the billions. watchdominion.org/

Waiting for any magical "reform" of the inherent torture, while still buying from them is morally indefensible.

Stop persuading veganism

War.