Don't go stepping on obviously wet tile. That sort of stuff.
OTOH, I have seen what can only be termed a complete lack of giving a s___ about dangerous situations by people who should know better.
McDonalds a couple weeks ago; one of the usual drunks filled up a large soda, and immediately stumbled and dropped the whole thing right in front of the front door. (Like most McDs, the side door gets most of the traffic, but people walking over from the college across the street or the bar on that side tend to come in the front, so maybe 15-25% of those entering come in that way.) Employee was headed to swap out the sweet tea, and stepped over the puddle without doing anything. Stepped over it again on the way back. There was a "WET FLOOR" sign folded and tucked in against the drink counter, so it's not like she'd have had to do much to at least mark the spill. Not a heavy traffic time, around 4-5 people in the dining room and no line on drive through, so it's not like they were swamped.
Ten minutes later, assistant manager wanders out to refill napkins. Steps over the spill and does nothing about it. People were tracking soda over half the store by this point.
Pointed it out to the manager. Nothing happens. Friends show up. We sit and talk for about an hour. Puddle is to large to step over by the time we leave, so we lay out a path of trays to get out the door.
90 minutes of a large liquid spill on a tile floor in a primary pathway. In retrospect, I really should have had my FauxPro running in case anyone did fall, to show the employees ignoring the spill repeatedly, my reporting it to the manager, and the complete lack of action on it.