Maybe someone replies. Maybe they don&#x27;t.  It&#x27;s a low effort way of saying &quot;Hey, I find this thing is worth 10 seconds of your time.&quot;  My friend sent me a snap of her niece throwing a temper tantrum.  It was funny.  I chuckled.  It disappeared.  We got lunch weeks later, and I asked if her niece ever calmed down.  She laughed, we moved on.  She got to share a funny moment in her life with me (and presumably other people) because she thought I might be interested.<p>If she posted on facebook?  You&#x27;d have people asking what was wrong, giving advice on how to calm a child, commenting about child abuse, and writing essays about the ethics of posting children to social media.  Whatever.