Direct Stream TV

Sure, but there are restrictions. You are allowed to stream 3 devices from outside your home. Only 2 can be used with streaming devices. The other 1 (or all 3) can be used via mobile devices. Local channels and regional sports may or may not be restricted to location based on device (if the device has GPS or location services),

Can any family member steam from a second location even if not a "household member (e.g. an adult child)" or does this violate TOS?

Sure, but there are no profiles. Every user needs the account info from the account holder to use the service. That means they have access to your ID and password.