[Trash disposal] weird person keeps posting pictures of people disposing trash

I found this weird person in Shinjuku who constantly posts people who disposed Trash on his holy trash mountain. Something you would only see in Japan I guess. Is he mentally disabled or is this normal?

https://preview.redd.it/6aruav4e7wmg1.jpg?width=1440&format=pjpg&auto=webp&s=ec904b788b6152f7e5671c8a8a8c5cee819e9e89