This is why I think the deer are using my back yard as a free buffet. Above are photos of deer in our front and back yard earlier this year. You can see they just about come right up my front walkway! Below is a photo of one of my pepper plants, the top just munched right off (I've since put tomato cages around them, hoping to save what's left of them). Also below are two of my bird feeders- they were filled on Saturday evening, and by Sunday afternoon you can see they are pretty much empty. Not even a legion of sparrows could empty them out that quickly! The way the middle terra cotta feeder has perfect little bare spots in the seeds, it looks as though the deer just stick their mouth in there and inhale it.
I do mind them eating my vegetables and flowers, but I don't mind them eating the seed because I know the squirrels get in my feeders every day, too. If I am going to put out feed for the "wildlife", I guess I can't be too choosy about who stops by for dinner.