Any time you cram more than a few people into a small space for hours at a time, you have to expect some level of conflict. When you do this five days a week for the rest of your life, even the littlest things can start an office war!
The thermostat is one of the most controversial topics at the office, which is why smart businesses keep it under lock and key. Everyone is comfortable at different temperatures, so eventually someone will get up and adjust the thermostat up or down a few degrees. Someone will quickly notice the difference in temperature and change it back. It won't be long before the thermostat is being adjusted constantly while everyone else in the office just glares and waits for their chance.