I agree, particularly when the posters over emphasise an issue that is already socially distorted. Domestic violence, in this case.
Here's a series of posters I saw on a church notice board...the photo catches about half of the series with the same message (and not a mention of mothers' violence towards children or wives violence towards men...all of which are at tiny proportions in the church).
And for Deming's view. When he says 'slogans' this applies to motivational posters too.
OTOH, a poster of biblical content would be great. We talk about the word; let's display it for quiet contemplation.