Each game has different difficulties, some are harder to beat than others. Not only will it be hard to decide which games would give which amount of points/trophies, some games are never ending and can not be beaten.
Also the site can not moniter if you have beaten a game or not and I am sure that it would be impossible to cync the site with all of it's games so that the site itself would know when you beat the game or not.
To be honest, I do not know much about how programs work in computers but I am sure that this would be possible.
Well we can think about these things. Like for later use. I mean it is a good idea, but as all of you, have said before, this is not going to happen at this moment.