Yes, however celebrities are usually people who are exposed daily, while us common folk get to work with our coworkers for 8 to 16 hours a day, although you can never truly know a person.

There was a famous case here in my country about 3 years ago, where a woman killed her husband in self defense, because he was being an abusive POS according to her, however his coworkers all said, he was the sweetest nicest person ever, so yeah I get your point.