Can you put some sort of guideline in place there? Like, "It makes me uncomfortable when you text continuously in front of me, so can you not do it in front of me?"
I don't know how you word it, but I would want to say something. When Dan stops by for a few minutes, it still drives me crazy to see him texting away. It could be the plant, could be a customer, but it doesn't matter, it drives me crazy!
