I for one love telling people they cannot contact me when I am flying as this allows me to catch up on my reading/thinking, etc. However I have noticed more "dinging" going on around me in the cabin in flight. As someone with ADHD the plane was the place I could focus as I can drown out background noise but the dinging/pinging breaks my attempt at concentration.
Please, if you are going to take advantage of this please put your phone on silent. Thank you in advance.