Actually, I realized this after writing out the whole thing but that sorry for the long rant is kind of like a good manners thing in Japanese internets. If you look up "長文失礼しました。", which literally means "Excuse me for the long writeup", it's usually appended to say a comment in a blog, or sometimes at the end of a Tweet when the speaker felt what they said is a bit on the longer side.

I somehow ended up picking up that habit somewhere down the line it seems. :)