I for one can see some good come out of this. Take Katrina for example, what did the local police do? Most hauled AXX, the remaining few joined in the looting. A lot of people were unable to leave because the people they were dependent on for transportation left. With no one to help them out of town they were stranded. The army could have gotten them out fast, and saved many lives in doing so.
The army being stationed here is not a big deal to me, we have lots of bases through out the country stationed here. One unit being tasked with training for crowd control to be used here in the US is not a big deal either, since all it takes is the signature of the President to have them all here doing crowd control. The Army is not my fear, it's the person at the top who has a hidden agenda that I fear.