Necroposting vs Not using the search function

Posting in an old thread like about more than 2 months old will surely get some people mad. For example the 'How to add stuff to signature?' thread. This thread was created by blabaMLG and the last post was from about three weeks ago. And its also in the first page o the board. So posting in that thread is better rather than creating a new thread. So now for the second thing, u created a NFS theories wallpaper that you want to show to us. And u look to the boards and lets just say you cant find it. (There is already a thread btw) Before you start the thread just say this '"I dont know wheter a thread like this has already been up.So i decided to go for a new one' People only go to the first page of the board most of the time. So thats it. Hope this clears up for you. Happy posting.