Conflicting advice about switching networks

[estark37]

http://w3c.github.io/reporting/#delivery says: "The user agent MAY choose to withhold report delivery entirely until the user is on a fast, cheap network in order to prevent unnecessary data cost."

http://w3c.github.io/reporting/#network-leakage says "For example, we could drop reports if we change from one network to another."

While these are both just suggestions, the conflicting advice would be confusing to an implementor.

[jyasskin]

I think @clelland said we now drop reports if the user changes networks. I have one detailed question, and then we just need to specify this. Should we:

1. record the user's network(s) when the report is created and only send it on that network, or
2. record the networks an environment settings object connects to over its lifetime, and only send reports on those networks?