In Spain there is a law for which the press cannot give the children's image without the express permission of the parents, they are forced, for law to covering their faces ... but not always they do it.
In case of the children of the Royal Family, they are a bit out of this law, because the Royal House and the press consider them public prominent figures. Nonetheless, in this topic the press has lost this autoregulation that was in the habit of having, and now the business is more important, and the limits are exceeded .... example the harassment to the children of the Infanta Elena after the separation.
In case of Carla, sense does not make because it is not a public figure. She should be to the margin of everything, and her family does the major effort in order that this way it is, but not always they obtain it. The family would have the whole right to denounce it, but certain press in Spain is very spiteful, and I am afraid that " the remedy is worse than the disease ", because they would end up by turning the topic something that to use against the family. So I think that they believe that it is better to carry it that to look for clashes.
I believe that the family of the Princess has been and is defenseless enough in the topic of the press, which I believe that takes advantage that the family does not want to cause problems to the image of the Princess. For them nobody demands respect and prudence like apparently has asked the Royal House to the press in case of the Infanta Elena.