Jammers
From Growtopia
Jammers are very key when it comes to having even more control of how other users interact with your world. They allow you to either prevent or enable a specific action.
There are 3 kinds of Jammers:
: Prevent users from knowing and showing (in worlds' menu) your world location when messaging or broadcasting.
: Prevent users from punching others in world.
: Prevent user from infecting others in world.