Should a support incident be opened for every stack dump, or just ones that cause an outage?
It's fairly cut and dry: If you want to actually work on the issue, collect data, uninstall/reinstall, isolate, test, potentially provide more dumps, potentially use things like appverifier and debugdiag or have a valid repro, then by all means open a ticket so it can be looked into and worked on.

If you just want to ship off a stack dump, with no other data, and have someone look at it in a vacuum, then I would not open a ticket as it'll have no traction and go nowhere. Neither party will be happy.

That's the short and sweet version.