Hmmm...not sure if serious? Play is important part of human relationships. Especially in professional relationships where you may spend more time with co-workers in a given week than with family. It builds unit cohesion, and promotes morale. Let your horses run a little faster and freer with a little more slack in the reins. Or not. Old dogs, new tricks and all that.
Exactly.
This has always been my experience.
If you create an environment where people feel shackled they shut down.