Because he is. The tyrannical ruler of Sam's bedroom.
The last few days, toys, mostly but not limited to stuffed animals, started making their way out of Sam's bedroom and into the hallway or my bedroom or Jubilee's bedroom or downstairs. I tell Sam to clean them up, and he does somewhat, but I still find them in odd places, even the bathroom or hiding in the closets.
This morning, at around 6am, Sam came into my bedroom carrying an armful of stuffed animals, including his favorite bear and a stuffed Wall-e. He dumped them on the floor next to my bed, and walked away, presumably to get even more toys. Of course, at 6am, I was half asleep, so I mutter, "Sam, what are you doing?"
"Bringing my animals."
"Why? They go in your room."
"Puppy is angry at the animals."
So, I guess what I'm trying to say is, I don't know what the other toys in Sam's room did wrong, all I know is, they are in Puppy's bad graces.