Developing a system

since my previous attempts were not applicable to the mood and place, ie VCU. I now tried by having just indexes of my problems, so that it is more in reponse to my audience whichare basically designers. Yet my challenge was to communicate these indexes well which wouold answer the problems
for example :
the spraying glue on floor. instead of actually showing the spray can used on floor, i tried by showing only the shoe stuck on to the glue on floor.
the throwing of trash on floor. instead of having a hand dropping trash i now just thought of having crushed paper fallen on the floor.
the the cutting on table. instead of showing the exacto knife and hand i simply traced the marks on the table.
disposing of the exacto blades. since i felt tha a cut is an index of this, i showed blood and bandaid. yet not convinced if this communicates well.
wasting printing paper. i showed papers just cuming out of the printer. yet here i felt i wasnt just following my system which was not to show the object that is the printer.
the spraying in classrooms. here i showed the spray all in the air.
the extra ones: i thought of closing the taps properly. here i just showed water droplets from the tap.
and then i thought of doing the toilets. putting just straight geometrical figures so tha not a lot of detail shows and it is in correspondence with the other icons. but still doubtful about it