Very common message posted to messageboards.
Normally posted by a disgruntled user when upset and wanting attention.
While someone who posts such a message will sometimes
mean it and will never again go to that board after posting such a message, usually once they calm down, they'll come back and will be posting as though they
never posted it.
On some messageboards, such messages are so common and/or posted by certain users so much that
people have learned to automatically ignore them.