We have asked people to not post things along the lines of "first post/page!", "new thread!", "*boogies*", etc. at the creation of a new thread. In cases where people reference the first post/page, the entire post is deleted, regardless of other content. The mention of the other things is somewhat tolerated, though frowned upon and not really appreciated, as long as there wasn't a rush to be amongst the first and the post contains actual content.
If you see it happening, then please report it.
Note, of course, that not all one or minimal word replies are contentless. I myself am a fan of putting a lot of meaning into a small reply. And, sometimes, a picture really is worth a thousand words. An example of this is where I have used a picture of a Facebook thumbs up to mean "Wow, congratulations! That is amazing news!"