Constructive is the key word. The majority of the time even with unsolicited advice it is in the approach. How you speak to a person is what will make or break a situation. Sometimes though, those of us that do see a 'better way' need to be mindful of the other person. Maybe there is a reason behind their madness.
You were featured in week 67 of @pifc's Pay It Forward Curation Contest by @bengy. @pifc is a Pay It Forward Community which believes in by helping others grow we build a stronger community. We run this contest each week, it is open to everyone. It's a great way to show off people you find that might need some more exposure, meet new people, and possibly win some SBI for you and your features.