What would that message be? "We are barbaric so you better watch out"?
It's nothing more than a form of terrorism, primarily against the American people.
No one, though, can really do anything about drone strikes. They just happen, seemingly at random, wherever we decide they should happen. And if we take out a civilian then we say "oops, these things happen" and so there are no repercussions, no one gets punished and it just keeps happening.