Keystone Masteries

So after my second ranked game today with some trolls who actively chose no keystone masteries and then fed and various other BS, I am curious if it would be beneficial if Riot would add in a way to see if your team has keystone masteries, and what they are on the champion select screen. This would obviously only be for your team and would be very helpful in A) helping dodge if you are going to get trolled and B) legitimately be able to tell someone YOU DONT HAVE A KEYSTONE PICK ONE if they forget.

I dont see how it could hurt and it only seems beneficial considering the type of things Ive been seeing non-stop in BS silver where all the newly placed accounts and trolls head to.

Just a thought.