Phone etiquette

It's ironic. I recall a few years back, when "PDA's" were big.  Do you remember PDA's?  I still have one!  I need to dig it out for kicks.  Anyhow, I had installed the Bible on it and would use it during church.  I was in a Bible class one night and since mobile technology was in its infancy people were not accustomed to the use of electronics during something as sacred as church.   We were going around the table reading from the Bible and it was my turn and I read from my handy PDA.  The shock was terrific.  What I didn't realize, and one of my dad's friends finally confided in him was he was shocked with how rude I was, he had been around me all my life and thought for me to piddle on an electronic gadget was beyond immature, not at all what he knew and expected from me.  He was so pleasantly shocked when I began to read from it, and he realized my "piddling" had actually been reading and following along.  The sheer irony of this is now that electronics are so prevalent and I have since installed the Bible on his wifes phone.  But the funny thing is, during Bible class she and others are piddling on their devices!  This is astounding to me because I am very regimented in my device use and I have places I very clearly will refuse to check and respond to texts unless they are emergently related to my business.   Church/Bible class is one of them.  Perhaps it's because school gave me such stringent electronic professionalism guidelines.  I don't know why.  But my dad's friend who was so aghast at me using my device inappropriately doesn't bat an eye at everyone now a days in his class that are using their devices inappropriately.  In my best estimation it is because technology is so rampant and many people, especially people of older generations, have not have appropriate etiquette training on the use of devices in public situations.  Technology and cell phones/tablets more specifically have really come into existence overnight.  Everyone has them and no one was really taught how to behave with them in public.  This is something that is just now being taught to children and it seems like there is no real consensus on what is appropriate and what is not.  It's very interesting to see how culture changes, adapts and accepts so many different things so quickly as technology progresses.