That's a great idea and much more better than comment or like rankings. It will show how much football knowledge the members have and let them compete with each other. For instance: Footyroom adds the upcoming matches for the top 4 leagues and members will have to predict who will win/lose/draw, scoreline, who will score etc. Something like betting but for points. If you fail to predict it right, you lose points. If you are unsure about a certain game then it's better not to gamble for points. and so on.
It might not be as simple as that to implement it here though. But that would be a real fun.
I know there have been a lot of suggestions for Footyroom and a lot of changes but I wanted to suggest something.
If I remember correctly, a long time ago (3-4 years ago), there use to be a predict the score bracket for Champions League knockout stages and there was a leader board system based on the scores you predicted.
It used to be very fun and I was hoping Footyroom could bring that back and maybe they could add Europa League or even EPL and La Liga (but of course, I don't want to just ahead of myself).