“Taking a chance” on someone is not good management. While it may be contrary to a popular adage, the cover can tell you quite a lot about a book! Without attacking you personally, a wise manager knows that evidence of poor personal decision making in ones private life is the best predictor of a proclivity for workplace screw-ups. If someone’s personal life is a mess and they display poor attitudes such as disregard for authority, complaining, etc. in a public forum, they will most likely make a poor employee despite their inflated modern self image.
Assuming the book is even accurately labeled. On the internet nobody knows you are a dog.
You're 100% right. But a good manager also knows that they may be a great employee and, at the very least, grant the interview. A 'wise manager' will be able to separate the chaff that way. But to preclude them solely based on FB posts and totally pass them up for an interview? Now that, my FRiend, is the mark of an unwise manager.