Responding to forum posts

I hate people that do the following in forum posts:

1.  Qoute a reply, only to talk about a different subject.

2.  When asking a question on a help forum, the 2nd poster asks why you want to do that.  Should they care why you want to use it.  If you can not respond to the question, do not bother to respond.   For instance I said, "Can someone recommend a handwritten font or cursive font for narration text in manga".  And the second post was "Why do you want to do that?".

Is there something wrong with people?  Do I have to answer this question in order for you to respond? If you have no suggestions do not bother to respond.
 I think people think this is the internet, thus I can say and do whatever I want because I can hide behind this blanket of anonymity and  say whatever I want (not that I am not doing it right now).  If you do this.  Do us all a favor and stop doing it.  If you can not answer the question.  Don't bother to answer the question.  Not only is it annoying to the poster, but those that are trying to find answers on the internet.  Please be considerate, and stop asking questions that will not resolve anything.  I see this on Microsoft forums too.  Asking why someone wants to do it, rarely serves as help for answering the question.

3.  Posters that double post, there is something great out today called the edit button.  Maybe this is something that is hard to see, but I hope one day that all users of the internet will be able to see it.

You can litter your forum post, with tons of smileys, stupid comments, incorrect grammar, and spelling.  But I think that people should stop doing the above, it will really make you a better person.