We don't quite agree. It is upon the person who is taking it wrongly - that is negative on their part. Everyone should practice saying 'no' without having to explain themselves.
Unlearning your advice is probably the single most beneficial thing I've done during my career as a programmer. While I at my core tend to think exactly the way you do about this, it's a righteous stance that only did me a disservice before I decided to take more responsibility for how I'm heard.
As the person delivering information, you by definition have more context than the person or people you're delivering it to. Asking the world to figure-it-out and expecting them to do so correctly is a path that I think is likely to net-cost you.
