Booster Change Runes
Will Booster Change My Runes?
Yes if it helps him speed up the lol boost you booster can change your runes.
Although if you want him not to you can just tell him not to do that, doing this might be counter productive.
Also if you ask your boosters to set up your runes to suit you and your game play, they will help you and set up the perfect runes just for you. After this you will immediately see better results in your game play.
Summary: Your lol booster can change your runes in order the speed up boosting process. And they will also set the perfect rune page for you if you ask him.