oh hell yes, it's complete segregation here
I don't really even like mixing people's laundry much, especially really yicky stuff with ordinarily grubby stuff. I'd do the really yicky stuff on its own.
towels and bedding get their own wash, and no mixing of kitchen with bathroom towels
I sort by colour, fabric, type of item and person...but I do combine loads ...yicky stuff excepted
I love laundry rules.