No need for him to leave; he's just contradicting your OP. If you can't understand criticism, why post an idea? He's adding ideas that can prove your idea. Embrace it with gratitude, don't be an ass.
Just tell him to get off the thread. If he doesnt, report to a mod and he will most likely get forum banned.
I believe that it would be fairly easy to program something that knows if you have viewed the profile before.
They wouldn't undertake something like that as it would require editing code that has had code built off of it meaning it would likely cause massive problems for everything and likely fail to work thus destroying the game.
That would cost money though. It's a good thought and needs tweaking but if it don't make dollars then it don't make sense.