Compromised describes exactly what you are talking about. Any free rider on a network that the operator is unaware of means the device is compromised.
If I'm using one of these services while connected to a guest wifi network, with the usual configuration for guest access (like no intranet connections), is that guest wifi network compromised? What's the threat model?
If I'm using one of these services while connected to a guest wifi network, with the usual configuration for guest access (like no intranet connections), is that guest wifi network compromised? What's the threat model?