If youre going to ban electronics because they are a distraction then ANYTHING that
takes the attention away from the GM and the other players should be removed as well.
Otherwise you're selectively scapegoating.
I guess what I haven't stated, is that our group has a pre-existing ban on doing other activities while gaming, including drawing character portraits, crocheting (yes, we had one female in our group that would sometimes do crocheting between turns on initiative). So my groups ban on tech corresponds to our ban on other activities besides using tech - our ban on tech isn't the only ban, nor otherwise isolated from other non-tech activities.
Also you need to consider that my gaming group largely consists of players that have been gaming together for over 20 years. The players with issues using tech, are the 2 newest players to our group having played with us only the last 3 years (about 30 years old, while the rest of us are closer to 50). Our older players know that doing distracting behavior is an antithesis to effective play, so they don't do such activities and the electronics ban doesn't really apply to them, since they don't/wouldn't use tech in the game in the first place. If anything the tech ban, is an extension of our existing ban, that required updating, when finding the newer players engaging in these distracting activities.
I'm not being "selectively scapegoating", I just hadn't previously mentioned any ban on non-tech activities, since that is not the focus of this thread. You cannot perceive my groups tech ban in isolation, there are wider more general distracting issues that have already previously been taken care of - the tech ban is simply an amendment to our existing ban.
Not that use of PDFs wouldn't be helpful, but we have all the physical books we need to play our games whether its D&D 3.5 (with over 100 WotC or 3PP hardbacks on the book shelf), or Pathfinder with about a dozen books that we incorporate in our games, including bestiaries. We have no problems with referring to a physical book to look up rules and guides, so there's no need for us to have an electronic access to a given publication, as we have all the physical books in ready access to everyone at the table.