"CAUTION! HOT WATER!".
Those signs are such an expression of failing to grasp risk assessments. If the hot water in the hot water tap is sufficiently hot to cause an injury the answer isn't to slap a sticker on it, the answer is to adjust the heater so that the water is hot enough, not too hot. You need to stick your own sticker asking "When is this going to be fixed?"
I work in lots of disused buildings as film locations and we once used a old university engineering department building where they used to test massive sci-fi lasers and the like. It was the most boggling assembly of high risk architecture and fit out I've ever seen. Aside from the main engineering space with its enourmous assembly of unshielded high power electrical installation, there was a warren of gerry-built labs and offices, with no natural light and with the light switch somewhere you had to hunt for. In one room we couldn't find the light switch so had a look around in the gloom. The was a small cupboard door in the corner that looked like the door to the 12 1/2th floor in Being John Markovich. I crouched down to have a look inside, pulled the door, didn't open. Leaned against the door as got back up and it opened outwards, the daylight illuminated a little pencil-drawn skull and cross bones on a postit note on the door and I nearly took a header off a 15 foot drop.
