Aside from useful suggestions, there are warnings as well.
"Oh, you don't want to go there. They pay peanuts"
"I hear the boss is a control-freak. She's a nightmare to work with."
"The office politics is just horrible. You don't want to get into that!"
"Everything works so slowly there. It's a wonder anything gets done."
"The work is uninspiring. You'll get bored easily."