Then why is it installed on AT&T U.S. exclusive phones like the 1520? This is not the EU's fault this is laziness, arrogance, ignorance, or all three on the part of AT&T, Microsoft, or both. They have no problem disabling wireless charging and short changing U.S. customers out of 16GB of storage on the domestic 1520 though, so there is no excuse about extra effort being required to "domesticate" the feature list. They could have disabled this volume nanny or at least made it selectable. They chose neither but had this been an iPhone or Droid? The feature either wouldn't exist or its usage would be selectable by the owner.
So as far as I'm concerned, this is on Microsoft for not enabling selection (where it could simply have defaulted to on for EU users) and on AT&T for half-***'ing the conversion of EU spec to US spec such that only the features that allow them to short change the customer and line their pockets got addressed. Period, end of story. So for people with motorcycles? Who need high volume on the freeway and who have to then either pull over or otherwise wait until they stop to get their phones out of cases, UNLOCK them (because nobody was smart enough to allow clearing the warning message through the screen lock which is also forced now, cannot be turned off and takes 2ns of inactivity to engage), and then acknowledge the warning and turn the volume back up? Screwed.
And that's before realization that this nanny ALSO quite frequently causes the active song interface in the top of the screen to time out and become unresponsive, leading to having to restart the music app or else fiddle with the volume until the song/volume interface reloads/refreshes. God forbid then that you have a buffering internet stream running. I've had time where I sat on the side of the road fighting with my 1520 to restart music at proper volume for 5-10 minutes, finally having to restart the phone to get the BS cut.
Never have this issue with my 6Plus.