Does Anyone Have Manners Anymore?

Okay. I've put up with this for long enough. No longer will I witness this level of rude behavior and not call out the culprit. Here's what I'm venting about. You're walking into a place of business. There is someone walking in just before you. Why doesn't the person in front of you glance back to make sure they are not letting the door close in someone else's face? Here's another one that is just as bad. You're leaving a place of business, and someone else is walking in. As you leave, you notice the other person and proceed to hold the door open for them to walk in. Is your decency and politeness returned? Absolutely not! A "Thank you" would be the ideal response, but, at the very least, a simple gesture of appreciation would be acceptable. From this point forward, I will voice my displeasure in such rude behavior.