I don't think there is any such restrictions on where you should land in the US.
The incident mentioned in various forums might be some rare cases and not something that happens regularly, but it all depends on your individual case and what you talk about your travel to the CBP officer.
Excerpt from CBP website, regarding second CBP inspection:
If you are an alien, the CBP Officer must determine why you are coming to the United States, what documents you may require, if you have those documents, and how long you should be allowed to initially stay in the United States.
Read on - Admission into United States