Rules when doing #2 in the bathroom at work

So nothing is worse then when you are running into the bathroom to go # 1 and when you open the stall door there awaits a suprise...a little leftover from the person before you. Now i dont know about most people but I find it repulsive going #1 over someone else's left overs. What is something accidentially splashes up! What if you fall in the toilet? Oh the thoughts that run thru your mind. Why Why Why dont people know the double flush rule!! If you are going #2, which we all do, please make sure you flush twice so nothing is left over. I dont think this is asking too much, just a simple courtsey flush or two.