I was trying to make the argument that zoning out on Facebook, flipping through TV channels, browsing Reddit front page for 2 hours, is all like eating mental junk food. It's tasty but not very nutritious - it should be consumed in moderation alongside a healthy diet of enriching foods/mental activities.

My main point isn't really about the technology, but the content - it doesn't matter if the material is on a cell phone, Kindle, book, or newspaper. Of course there can be junk in books and newspapers, and enriching information can be found online. I was just ranking the action of "aimlessly browsing social media" as pretty low on the nutrition charts.

OP doesn't feel strongly about social media or online shopping - he just doesn't like when you do it in the middle of a date, just as I wouldn't like someone pulling out a book in the middle of a social event.