Yes, real people made these comments.

Now that I think of it, I don't even remember how I managed to stumble on Mario's Facebook Fanpage. I think I saw it in passing on someone's wall, I'm not sure though. I was expecting some stupid, idiotic replies, but what I actually found far surpassed anything I could have dreamed. There was another reply that I didn't get, but it said something along the lines of "I don't even go to school, I just stay home and play Mario all day long because he is my only friend and he can't ignore me." Obvious, uproariously laughter aside, that's pretty sad >_>