Nastygrams only make support folk nasty. In this case the details of their network will be unknown to all but a handful. It does not hurt to ask but it is not worth a nastygram.
When it costs me a new router for $80+tax, its worth a "nastygram"...
What about some mystery packets forced you to buy a new router?
Nastygrams are a good way of getting put in the "problem customer" queue, where enough grief will get you dropped. Big companies with little competition have little incentive to spend lots in tech support on any one customer. You have to make friends with the techs to get good results.
