You are a more patient man than I am if you do not get annoyed by it. But if everyone used the Roxy method of posting, this board would be unreadable/unusable.
Quite often, if someone starts a new thread, and it relates to a different topic, mods will merge it. Or if someone starts a new thread that does not get any response, the poster will get the general idea and not do the same thing anymore. Or if someone says something stupid, they will get called out for it. Some of this is basic etiquette and understanding social cues. I lot of folks here post dumb stuff all the time, including myself, but still tend to follow the norms of the board.
If I started creating new threads with question marks as the title, or a new thread with a selfie, or a new thread with some random joke I heard, I hope that the fine people of Huskerboard would set me straight.