Do Not Water the Plants

I am sitting in the cafeteria of Za's building (many, many labs, and places to get coffee!).

Anyway, I am grading---grrrrrrrr!---which leads me to be easily distracted. I just glanced at the Ficus tree, which has a huge sign that reads:

Do Not Water
the Plants

Thanks.

Maybe it is just me, but this cracks me up. Overwatering the plants in my house, my office, or my workplace ain't likely. Only would a bunch of biologists be likely to do so.