What about Gossiping and vulgar language
Gossip can sometimes ruin the reputation of those that your gossiping about. Most of the time gossip is skewed, misunderstood truths, or outright lies. If you're the starting point of slander or gossip, people take that very seriously, then your name will be on the bad reputation list.
Swearing when the situation is proper, whatever, I still wouldn't even then, but using vulgar language isn't a right course of action in an office setting, especially when your talking with a business client. Clean speech will always generate respect.