Yup, having been in this situation before you just buy some significant headphones Either they are comically large full size over-ear headphones, so it is obvi

Yup, having been in this situation before you just buy some significant headphones Either they are comically large full size over-ear headphones, so it is obvious you are in the zone OR You get some IEM style in-ears that block literally everything and you ignore anyone walking up until they wave their hand in front of you Either way, the act of taking off the headphones needs to be exhausting and take 30 seconds so whoever disrupted you doesn’t want to do it again frivolously