Now, I'm not so sure if this should be directed at a specific stranger or just strangers in general. So, I am directing it to a specific "group" of strangers.
Do what you say you are going to do when you say you are going to do it. Remember that the entire world does not, in fact, revolve around you. Keep in mind that other people have their own lives and their own things going on. It's not right to think it's all about you all the time.
Someone who is tired of selfish strangers