Ah, yay! Glad it's not just me! And like I was just commenting to someone else above, the Stargate shows have a lot of darkness in them, too, as far as dubious moral choices the main characters make, but it doesn't bother me as much because at least it's acknowledged within the main group of canon characters that they're doing something wrong. There's debate and at least someone says something along the lines of "we shouldn't be doing this". Whereas with Doctor Who, it's just unthinkingly callous, the way they treat other people...

But other people have also raised a lot of good issues in their comments as far as *why* they behave that way -- off to address them.