Why is this allowed?

This person was moved back here and is a good 8 inches into my space. I have to sit uncomfortably smashed into the airplane wall for 2 hrs.

I fly every other week, and this happens way too often for there not to be some sort of guidance for this.

This person was moved back here and is a good 8 inches into my space. I have to sit uncomfortably smashed into the airplane wall for 2 hrs.

I fly every other week, and this happens way too often for there not to be some sort of guidance for this.