NIS 2010: Network Security Map Question (Device Trust Level)

I just updated to NIS 2010 (amazing software!) and when I click the "Network Security Map" it shows the 2 devices I have under my 'Local Area Connection':

  

1) my PC connection

 

2) Satellite Video-On-Demand connection (used to stream movies) 

 

Both are connected to a Netgear router.

 

At default, the "Device Trust Level" for my 2nd device/connection is set to USE NETWORK TRUST (PROTECTED).

 

Would there be any harm if I changed this setting to FULL TRUST???

 

I want to insure that the network traffic for this connection is not interuppted or hampered by NIS 2010.

 

I just want to make sure that this is SAFE?

 

Thanks.