Summoner Spell Tab Options

Okay so I thought this would be a pretty continent feature since Riot been implementing a lot of pretty convenient things.

Basically, when someone says "no f mid" there should be a feature when you can go into Tab and click on the enemy summoner spell and it will start a timer on the Summoner Spell icon counting down the enemy cooldown for the spell. It doesn't have to affect the entire team, this way, trolls won't be able to ruin this feature. It's a pretty simple, pretty handy feature. What do you guys think?