No dope dealing criminal scumbags. Sounds like a good place. What's not to like about it?
Because after you mow down dope dealing criminal scumbags, that mowing down genie is out of the bottle. From then on, whoever has the power gets to pick the next target for mowing down.
Once the government decides it has the power to "mow down" people just because they have decided they are "scumbags", guess what happens to YOU?
As far as the Obama administration is concerned, ALL right-wingers are "scumbags".
Before granting the power to kill fellow citizens to government entities, think LONG AND HARD about what that power would do in the hands of people who don't like you.