Daniel Matros (DICE Community Manager) has been talking in a podcast by Dont Revive Me Bro. He has recently confirmed that snipers will get scope reflection & scope sway to balance out the addition of prone. Snipers that lay still for a certain amount of time will have a reflection in their scope that will give away their position (appears as a small flash to the enemy). Snipers will also have scope sway to stop people from overusing them. Scope sway ensures the constant movement of the cross-hair so its not as simple as aim and shoot.
These features have been added to balance the addition of prone to Battlefield 3 gameplay. It will prevent snipers from being overused and stops snipers from constantly camping.
Listen to the full podcast from Dont Revive Me Bro: Here
He talks about a lot of stuff incl. Beta news in a few weeks, quick scoping, female soldiers...