I used to work for an oil & gas company, and those kind of firms have a really strict health & safety culture (all accidents being reported as one total number, so someone scalding themselves on a hot cup of coffee can’t be differentiated from someone being blown up on an oil rig, and the goal was ‘0 incidents’).
Not only did we have to hold the bannister, always put a cup on our coffee, not walk while using our phones etc, but we all received “intervention training”, basically training in telling off fellow colleagues for breaking these rules. As you’d imagine, some people took rather more enthusiastically to “intervening” than others and I was told off multiple times by people for e.g. not holding the handrail while walking up the stairs.