[mothered]

When the SE Is prepared and executed accordingly, assuming the role of an Internal employee Is usually quite effective. I think you've documented It very well.

In terms of getting the user's IP address, I'm glad you've suggested Grabify.link. I've tested this site on a very In depth basis over a 3 week period on countless users, and can confirm that It serves It's objective extremely well.
An alternative site Is WhatsTheirIP. I've also put this to the test and It performed as expected. Bear In mind, you must use a Gmail email address with this website.