these lockers have signs posted, "no packages are to be left outside the lockers. any violations will be reported immediately" blah blah blah.
there are never any packages left outside the lockers, whether by ups, fedex or amazon. a different apartment complex i work on another route has lockers inside a locked room. when the lockers are full there are signs partitioning the room so you can leave packages for bldg 1 over there, bldg 2 over there etc. it's inside a locked room but i still think our mgmt would frown on that.