Just have to second the title of your thread as I'm a living witness to it. The problem with most new forum users is, they just don't think about creating a relationship with other users of the forum, they see a thread they are interested in, drop their reply and off they go without returning to that thread to see if someone was interested in what they wrote via replying to their reply to start a conversation. We have to learn how to interact with one other and not just post randomly on the forum.
Create relationship and as you're doing so, be polite (just as OP says). Simultaneous conversation is what lead to relationship buidling, engage in such and you would enjoy the forum. What I love about the forum is, there's no discrimination. The opportunities aren't restricted to some fav type of citizens as everyone has equal opportunity on the forum. Great thread OP.
Indeed creating some kind of relationship, mutual understanding etc is very important as many are using the forum on daily or weekly base.... And when you come across with other users you will meet them more as once especially when writing in the same boards... I think when you are a kind and normal user then everyone will help you out whenever you have a question, of-course when somebody acting like a complete tard then its obvious people treat them that way.
And yes some just throw in random comments and never turn back, thats a bit wrong as well....