What do 'regular' Hindus think of the Aghori?

I am just interested, and don't want to offend anyone. My friend is a Kali devotee, and she was spending a lot of time at the crematorium in Katmandu. She told me she met these Hindu cannibals called Aghori. I'd never heard of them, but she told me there wear all black, perform black magic, and eat human flesh. Is it legal, and is it considered acceptable by most Hindus? That's all really, just very interested.