User blog comment:- Darkchylde/Acnologia's Element?/@comment-173.87.12.242-20141211055642/@comment-7418318-20141214084219

"Other than fairy tail i havent heard of any humans he attacked in over 400 years for all we know he could be trying to protect humanity"

At some point it was mentioned that Acnologia wiped out an entire country. I'm sure there were quite a lot of people who died in that incident.

And I'm also pretty sure that there were no reports of Acno attacking Humans because he usually doesn't leave survivors or witnesses. Gildarts said he barely escaped alive due to being extremely lucky and that guy's a true monster himself. Anyone else would have been dead.