As I frequently use my tablet during choir performances, it's regularly needed to keep the tablet under the arm, facing the audience, like you'd do with an old-skool folder containing scores. This is common when the choir changes position (in the middle of a performance, or when it enters the stage e.g.). 

During such events, all kinds of "disasters" can (and do) happen - depending on which screen is active, the ordering in set lists can be modified, or scores will advance/go back to random pages because of accidental interactions. 

If there were a simple way to disable the majority interaction during such events and quickly re-enable it afterwards that'd take away a lot of friction on-stage. Maybe this is possible already, if so - please let me know.