Something I had though for a long time

I had thought some realistic life style of humans for quite some time.
I wonder do you guys think that humans are kinda the weirdest animal in terms of bad behaviors?

Humans are the only species that:
1. Pierce them self (In other words, hurting them selves).
2. Cut other animal's skin out and use it to put on their body.
3. Destroy nature? LoL, In a way.. (Animals shit to pollute, but humans have move way to pollute other than to shit, LoL)

There maybe are more but I just could think it till this now, keep brainstorming dudez!!