The word Ban has connotations
If implies that some higher authority has ordered a cease in trading, with an added hint of implied wrong doing. This situation is more like if you were a shop keeper with no stock. Would you be happy with the description "ban on sales" then?
I'm not inclined to ascribe the local presses use of the word to bias or being a part of the local established media's attempt to undermine the NBN simply because I don't think they are bright enough to do so. I've met a representative sample and I think they've just chosen the shortest word.