Why Futuristic Technologies (Except Renewable Energies) Should Be Banned, Never Be Made, or Never Become Common

The items in this list have been selected by the author of the list for you to vote and comment on.
The Top Ten
1 They steal jobs
2 They could end the world
3 They could outperform humans
4 They could be racist/sexist
5 They could be evil
6 They could cause extinction of humanity
7 They could replace easier/good jobs with harder/impossible or had jobs
8 They could go/cause war against humans
9 They could destroy the environment
10 They could choose who to kill, which is as bad as, if not worse than, murdering people