Honestly! How hard can it be? Nobody on this planet is so busy or so important that they can't find the 97 seconds it takes to thank a fellow vaper for his or her kindness.
But most people "THINK" they are that important. And they've never been taught common courtesies. Like saying thank you and your welcome.
Take one of my bosses. For the longest time when he was done talking to you on the phone he'd just hang up. No acknowledgement he was done or the conversation was over. Just a Click.
So I started hanging up on him. He'd ask a question, I'd answer it then just hang up. He'd call back and say he wasn't done. I'd say OK what else then i'd answer that question and hang up again. He got the message. He now treats everyone with a little more respect.
EDIT:
And thank you for posting this.