Its not the WTS's way to simply say "Don't watch Dateline this week."
Rather they'd draft some big elaborate special talk on "Guarding against Satan and how he manipulates the media" or some such thing. And then the rank & file witnesses would deduce this subtle message, and avoid watching Dateline.
However if the society said straight up "Don't watch Dateline" most witnesses would obey. 'Cause in a household, your spouse wouldn't allow you to watch it or vice versa. Nor let your children watch it. And if you were to watch it, you wouldn't be allowed to talk about it to anyone anyways.