Today in irony, Amazon registers a patent to prevent comparison shopping, a.k.a. showrooming, in physical stores.
Given that Amazon is probably the biggest beneficiary of showrooming, it seems they maybe just jumped on this to prevent someone else from doing so. Also, I’ve no idea how this could be a “patent” given the technology is basically just “block competitor URLs on the in-store wifi’s web proxy” but… whatever. You do you, dinosaurs in the patent office.
Tl;dr, you shouldn’t be using free in-store wifi anyway so… yanno. There’s that.