I used to work in a factory, not your normal kind of factory...no, this one was still in the dark ages. They had no idea what a computer was, jobs were jotted down on stray bits of paper and often became lost for months, when they eventually surfaced we'd still be expected to know what the job was, who it was for and what the material list was.
The boss drew his mud maps* on real mud.. (this actually happened from time to time as he would draw it out with a stick in the yard and ask me to go make it)
One of our biggest problems though was a total lack of ventilation in this huge tin shed, in an Australian Summer it was quite unbearable; we needed lots of cool water.
We actually had to threaten a strike to be graced an old secondhand fridge to keep our drinks cool… 
Each day I would cool two litres of rain water at home ready for the next day in hell, each day I took it in with me and put it in the communal fridge and each day when I needed a drink I would go to the fridge to find that someone had been drinking my water.
Now I'm not all prudish but the thought of these Neanderthals slobbering from my water bottle several times a day did not please me, in fact I would pour the water out, clean the bottle and try again. Day after day, week after week I tried everything to stop them, I put my name on the bottle, I even put half a cup of salt in it one day..
Then one day desperation kicked in and I thought to write on the bottle "I spat in this" (in fact I did, just once so some of them saw me do it)
It worked! They stopped drinking my water and at last I got to have nice cool water all day. (triumph!)
Until one morning when I went to the fridge and found two bottles with "I spat in this" written on them, my mate Jeff had taken my lead and copied the idea… My sense of humor kicked in and I headed to my toolbox to find several different colored textas.
Armed and ready I headed to the fridge..
Under Jeffs written warning I wrote 'So did I' in one color and under that I wrote 'Me too!' in another color, just to finish off I wrote 'And Me'.
An hour later I found his bottle in the bin….
My profuse apologies meant nothing to an upset Jeff…
*A mud map is a rough technical drawing
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