Is Playback To Attract Birds Bad?

I visited a local nature preserve the other day It had nice habitat with a stream surrounded by thickets, steep hillsides with mature trees, and then it led down to this swamp. The thing I liked it about it most was that no one was there. It was just me and the birds.

I don't get a lot of warbler photos. They are tough to keep up with using my point and shoot. This is a Black-throated Green Warbler which are usually high up in the trees. 

I got lucky when this one came down to a puddle to take a bath. I also decided to stop trying to chase new species to add to my list and instead, visit places that appeal to me using my own instincts. I wanted to slow down and stay in one place for a while instead of rushing to get through the trail. 

One way that birders get better pictures of birds is to playback the song of a bird to attract them. Some birds respond more than others with this technique. There is controversy over doing this because it is thought that it can disrupt birds, especially during nesting season. It could move them off of their territory or agitate them causing them to waste energy on chasing down an imaginary rival. There hasn't been enough conclusive research yet to see exactly what effect it really has. Some are completely opposed to it and others are 100% for it. I believe that many birders/photographers secretly call birds but don't want to be seen by others while doing it. For years I never did it. I was opposed to it. Now, I do it occasionally and only for a minute or two before moving on.