Etiquette question here:

Is it ever okay to comment on someone's carseat usage because of a picture you saw posted on Facebook (or the Internet in general)? I don't necessarily mean publicly either. Like, if a picture is posted with loose, twisted straps, child not in properly, dangerous aftermarket accessories etc...would you say something to that person? Have you? Should you, or should you mind your own business? (Keeping in mind that a child could potentially be injured or worse as a consequence).