I'm kind of over the whole "Look, we killed someone far, far, far away for dubious reasons with NEW technology" articles. These folks halfway across the world aren't bothering, nor do they actually threaten my freedom in any way shape or form.
While we can debate the level to which America needs to get involved, are you forgetting 911 or any of the other terrorist attacks? It honestly feels downright insulting to the victims of terrorism that you would imply these extremist groups do not threaten your freedom. The article specifically references that these devices used on members of aal-Qaida; the group responsible for 911.
It's neither proportional nor effective.