if i may comment, so far in my dealings with ST and other people from the media, they had been very professional in so far as copyrights to images. They will get a photographer to do the shoot and will select from them. even when i offered them some images out of convenience, they refused to accept them as they hinted the company has very strict rules on image publication. They always prefer to produce their own pictures. (A 1 series Canon body is a norm as the company can afford these).
For the odd cases here, clearly some were misguided or did it out of deliberation against the co guidelines.
Another way the paparazzi does it is to take a picture of the picture (eg a picture on wall or picture stand). That way, they can claim the photo is theirs.