It would pretty much function similar to where you left click or shift left click it to get it put in your inventory after you've placed it. I would like this to be added so people can fill in the custom item frame models without them being able to be walked into. It also allows for people to be more creative for their houses (such as parkours, mazes, and secrets). I don't think they would be that much of a problem if they get lost easily since you can bump into them and they have a block border if you look at them. If anything item frames are more easily lost because its just 4 pixels and you can't walk into it and it doesn't have a block border.