Totally agree with you, though I'd love for people to take true engagement to another level ie to the account level and not post level. To me, responding to comments to my post is not only a sign of appreciation, but basic manners and respect. After all, if someone made the effort to nod and smile and say good morning to you, it would be rude to ignore them and not respond back. But wouldn't it be nice if we all went out more to say hello to strangers instead of just our own friends? You never know who you will meet.