Managers that have sex with employees and lie telling them that they will give them promotions
Lying to candidates and telling them they can guarantee that they'll get hired on permanently when they know its a contract position - also promising candidates more money and then pocketing it themselves
Lying and pestering clients and telling them they have contracts with them when its a complete and total lie.
Drinking and Drugs at people's desks
Stealing money and supplies from co-workers and the office
Stalking you when you go out with your non-work friends