I agree ultralight goes too far when it infringes upon LNT. Packing out garbage is added weight, you can build a shelter out of cedar bows, etc ...

How about disposable products that are lighter weight than reusable products? I have a friend who packs in a new emergency blanket every trip that he uses as a ground cloth. He packs it out, but it ends up in a landfill, when he could have used a reusable sheet. Is that antithetical to LNT?

It blows my mind when people spend inordinate amount of time, energy, and money to get out into "pristine" wilderness and then destroy it.