Yeah i get all riled up because i think someone has returned after being gone for a long while, then i realize no, somebody just replied to an ancient post. I hate when that happens.
Also i think management doesnt like it because it pulls the thread up from history, and i think the site performs better when the threads are fully current, not half new / half old.
Also im bummed that there is not a gif of billy crystal on SNL whinng "i hate when that happens!" They are usually pretty gross so i wont link one here, but you can google it.