Urbit is a network where you can, by default, trust the other party you're communicating with. It does this by making identities hierarchically controlled; if you behave badly, the rest of the network will blacklist you and your master. Thus, your master has a strong incentive to police your behavior.
tl;dr; it should be a spam free network.
Note that this is already a mechanism used in the public stock markets; your broker polices your behavior because if you screw up, the broker is on the hook for your losses, and the clearinghouse is on the line for the broker's losses.
tl;dr; it should be a spam free network.
Note that this is already a mechanism used in the public stock markets; your broker polices your behavior because if you screw up, the broker is on the hook for your losses, and the clearinghouse is on the line for the broker's losses.