Lego is a mirror for society.
@rstockm There's definitely a range of expressions. The guy you included is more detailed than older minifigs. The original point was there's an overall trend toward representing police as more aggressive and hostile. Lego is more conscious of being friendly and positive than many toymakers (see the discussion of Playmobil elsewhere in the comments), and still it has crept into their toys.
How would "LEGO City Undercover Elite Police Officer 3" (i.e. #4) be viewed if you took him back to 1980?