I am obviously not very approachable, because I read in public on my Kindle all the time and nobody ever interrupts me!

What can it mean?
Just this morning I sat in the restaurant at Ikea for about an hour with a cup of coffee and read. Nobody even looked my way. I'm pretty sure I give off "leave me alone" vibes though, because I really hate to be dragged into a conversation that I don't want to be in. Probably you just look like a nice person.