Friend spectate indicator?

What if there was a message that came up like a match invite, but it is a spectator request? Maybe in champ select 'Player 1' could send a spectator invite to 'Player 2'. 'Player 2' will then accept or decline, like a regular match invite. I know that not many people I know use the spectator function we currently have, but couldn't this encourage it? For instance, a player on your friend list, you may know in real life, just bought a champion but isn't that good at using it, you could enter a match using the champion, send a spectator invitation with maybe a message on it e.g."Elise guide". This is an idea that hit me when I logged in and saw the currently played matches that may be watched on the client.