Funny Things In MRT Stations

I've discovered 2 things that are strange in the MRT stations of Singapore:

First, for some unknown reason, its not safe to sit on the benches. Every once in a while an announcement will be made that goes "...for your own safety, please STAND behind the yellow line"

Second, I've notice that there are always 2 quotes displayed on the LCD screen that tells you that the train is coming or how many minutes till the next one. However, the strange thing is that they only change one of the quotes and the other one is the same every single day, and it goes: "if you see anything suspicious, please inform our staff or call 999."