Can we please get an Invis status option?

Sometimes I just want to play a couple stupid games on my own. A lot of the people I play with want to play with me, but only play ranked. I on the other hand generally prefer the casual fun of normals, and the freedom to play whatever champions I want to at the time.

I can't think of a reason to not have this option in the game, and it would probably result in a moderate increase in play rate as people are willing to go on more often if they aren't being harassed.

Unless this would cost quite a bit for Riot to implement, they should just add this. It'd be nice for those players who would use it, and it would result in more play.