Posting "just search it" all its doing is bumping the thread. If it bothers you ignore the thread, and it will go away. No one is forcing you to read the thread or post in it.
Posting "just search it" however makes you look like a jerk, and in my eyes discredits you.
This is a common problem with the internet people get to hide behind a computer screen, people love to be a *jerk* to other people online. My only guess is they suck at life and being a jerk online makes them feel better.
*edited for language*