I live in Germany, in a completely safe and virtually crimeless idyllic suburb. A couple of months ago I came home at noon and noticed a small group of what looked like thugs loitering at the front door of my neighbor's house. One of them kept banging the door and shouting "open up, or you don't want to find out what happens next" (or something to that effect) in a thick regional dialect.
All the neighbors were hiding in their houses, but I was already on the street right in front of them, so I walked over and asked "is there something wrong here?". Two of the thugs blocked my way and the shouting guy exclaimed "move along, there is nothing to see here".
This was the point when I was getting out my phone and started dialing the police emergency number, just as two trucks of the fire department and a police van were moving in from opposite ends of the street, coming to a halt in front of the house. Uniformed people swarmed out and joined what I had assumed to be thugs before. Turns out they were plain-clothes officers.
In the end, it came out it was a pot raid, but apparently nothing was found. In slightly different circumstances, this could have escalated quickly. The plain clothes officers were clearly looking for trouble. At the very least they were enjoying their effect on the civilians. It's not a SWAT yet, but it's enough to make me uncomfortable; especially considering the history of the country.
It's not always been like this here. I do have friends who are police officers, and generally they take pride in the fact that (and I quote) "it's not like in the US", but I'm afraid we might be importing this problem now.