Some people don't know to interact

You have a point. But then it is better to say something short and meaningful than to say something otherwise! What do you think?

well, i am sure i am not one of them, right?

I've seen that recently took and one with one person I took a lot of time to inform them why they're not making much here. Some of us can make two comments into a long thread and say something worthwhile each go-round. Not everyone does this and even some that know to interact don't try to reply to responded on their own posts. I think that's silly for they don't know whether those replies could provide ongoing conversations. Eventually, even good threads have to die out but that could be days or weeks later.