Hope certainly didn't think that she was a mean girl - she just didn't have any patience for people who thought they knew how to defeat the supernatural and didn't. They ended up dead. Even people who did know how to take care of themselves ended up dead - like her mother, father, and uncle had. So they were just being stupid, especially if they were just humans who didn't have any supernatural powers.
"You have to have special equipment?" she repeated, looking rather amused by that. "Oh, right, you're human, and don't have any powers to protect yourself with, which makes ghost hunting extra stupid."
She looked at the couch and then at him, and it clicked.