The legal system out of control?: Engineering student who likes to blow up toilets on her property

An engineering student who likes to experiment with blowing up toilets?  Does the federal government really have nothing better to do with its time?  She owns lots of guns and ammo?  Are the pictures of her owning a hundreds of rounds of ammunition supposed to be scary?  Do these reporters understand how someone can shoot hundreds of rounds during an afternoon?  Has she threatened anyone?  She admitted to police that she has smoked pot and used meth and that she did those crimes along with owning guns seem to be enough for them to hold her.  Obama has admitted to using pot and cocaine, but even though he has admitted to that would it make any sense to arrest him?

My guess is that this woman's real mistake was talking to police without having a lawyer present.