OR a suburban home?
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The theory always seems to be that such law enforcement assets are to be used only for the most dangerous situations where officers might have to face violent opposition.
The problem is such situations are few and far between. So the rest of the time these assets whether a SWAT team or vehicle or whatever sits around and trains goes on display in a parade or whatever. Then everyone from the politicians on down wonder why they spend so much time and money doing very little. THEN they start to find reasons and excuse to put these assets to work.
Inevitable you end up sending these assets out for situations which would otherwise be routine. Then we start seeing the result such as innocent people being killed because a heavily militarized police force raided the wrong house due to a typo and the innocent homeowner had no idea who was attacking him and tried to defend himself. Or just had a heart attack after being forced from a deep sleep into a life threatening situation with people pointing guns at him or her.
100 years ago and beyond ( and even for a long time after ) we had violent gangs and criminals as heavily armed as they are today yet the police were somehow able to effectively deal with them without all of the militarization they have today.
Civilization needs law enforcement and ours is no different. The question is how much and we must always remember more government equals less freedom and liberty.