They kill innocent people which qualifies.
no
the terrorrists broke down the 2 bulding in usa with an airplane
The planes were hijacked by Al-Qaeda terrorrists and deliberately flown into the towers.
they are cute, creatures that are afraid of humans cute furry
Because you make it bad.
whats so bad about the steam engine
yes his bike is so bad
Hurt So Bad was created in 1965.
Why You Treat Me So Bad was created in 1986.
Nothing is bad about him
"bad" as in a bad person? If so, then yes.
It is not so clear why Joker is so bad but all we know is he is a great character.