no, but the concept of marketing still makes sense. We know that corporations devote a lot of resources in marketing. Is it ok to "brainwash" people into buying stuff that harm them?
Dishonest marketing does not infringe upon your property rights. I've never heard any libertarian claim that limiting speech, for any purpose, is justifiable base on libertarian ideals.
What is dishonest marketing? for instance, using various tricks to make people smoke cigarettes or drink coke (that is bad for them), is that dishonest?
Exactly, libertarianism cuts both ways. The protective regulations that the companies lobby for wouldn't exist in the first place in a system like that.