I remember the dev who programmed the drone said it WILL affect stealth detection.
But as Roland said, it won't affect combat or zombies at all.
I doubt it'll ever be possible (unless they limit the range) since you could send it to points on the map where the chunks have been unloaded because you're too far away.
The drone should be a mid/end-game thing, so it'd be fair to have it give a little more protection and bonuses.
IMO, it's all a question of balancing (as always).
You already have rocks that are much more efficient and already work.
Yeah, someone already mentioned something along the lines, but IMO there are two main problems: 1) You need A LOT of additional ORIGINAL music scores added to the game or... 2) You need to provide a way to have custom music added to the game (e.g.: MP3/AVI playlist in a folder).