It's rude to deprive your colleagues of caffeine.
Matt is a health reformer and doesn't like seeing people drink coffee at work, knowing that it's not good for their health.
Matt wants to get people off of their caffeine addiction.
Matt gives health talks at the office on ways to improve energy without using caffeine.
Matt comes in and removes all caffeinated coffee from the office, then throws it all in the trash.
Some people try Matt's methods and break free of their need of caffeine.
The office workers go into caffeine withdrawals, bringing their productivity down to zero.