We can ask people-
not to spit 29 metres from a wall, thus saving paint worth crores (paint companies may not like this, but..)
not to hug your boyfriend/girlfriend within 455 metres from either your house or theirs.
not to wear bikinis within 20 metres of a beach or a pool. You can sunbathe, but not swim in them.
not to smoke within 5 metres of anyone, to prevent them from going up in smoke. Also on Sundays. Smoky Sundays are intolerable.
Not to turn Republic TV channel on within 300 yards of any resident of our republic- health hazard!
Not to read a Dave Barry or PG Wodehouse within 5 metres of people without a sense of humour.
....you get the idea. Now go 10 metres away and frame your own rules!