These coworkers just couldn't get along with their store's greeter. You'd think that as a greeter, you'd have to have a sparkling personality, or at least be pretty easy-going. Greeters are placed at the front of big chain retail stores to say hello to each shopper who enters. They can point shoppers toward the right sections of the store, and many of them check receipts as customers are exiting the store. A lot of times, these positions are given to older workers. That way they can sit down an…