LOL we are funny, aren't we? A simple answer, no politics involved....

Anyone who thinks a previous post -or thread- is important and wants that post -or thread- to go to the "top" of the list in a forum listing can do so....

they can do this by posting a new post. (Right? This happens every time!)

Often, instead of writin, "g Hey I think this is a good thread and I want you all to read it," they just post "Bump." That bumps that post/thread to the top.