> ... I didn't want to be mistaken for ...

Who cares? They're strangers. If they want to make faulty assumptions and feel an unjustified smug sense of self superiority that's none of my business.

At this point I read ~all books on my phone as a simple matter of practicality. I'd prefer my phone had an epaper screen and grayscale page centric apps (instead of scrolling) but that's just not how things are.