Likewise I would imagine backpackers must be even more organized and neater (after all, they must all have less space to store all their belongings, which would put on pressure to be organized about it), I can't imagine they'd appreciate Japanese people being in the way like this.

Where I come from there are ever increasing numbers of people living in houses and its a real problem. They usually just cause problems, dont pay parking fees or fuel duties and ruin the area for everyone else. Some towns have mandated them which is worse for the few travellers that used to do it on a short trip