I find it disturbing that SWAT teams are increasingly being used to serve routine warrants on non-violent offenders. It seems law enforcement, like all other parts of government suffers from a chronic lack of common sense.
They told their chief/sheriff that they desperately needed all sorts of hand-me-downs from Delta Force and he/she conceded. Now they have to justify having all of it around.
In my experience, unless its a hostage/barricaded gunman type thing, a simple unassuming knock on the door was more productive than anything else.