Culture and appropriation

A recent article on the BBC news has raised some interesting questions about culture and who has the rights to use it. 

The kingdom of Lesotho has a tradition of blankets made from wool with the intricate patterns telling stories of the people who make and wear them. A Cape Town designer , Thabo Mekhetha, who works in the fashion industry has used these as the basis for her own designs. Thabo comes from the mountain nation and is proud of her heritage but it seems that others have also been using these iconic pieces; Louis Vuitton amongst others has used the patterns in their cloths. 

So where does cultural appropriation begin and how does one acknowledge other people's culture without taking advantage of it? It is an interesting question, isn't it?