I've modded one of the situations you reported; however, in the other situations you reported, the posts are the equivalent of saying "agree" or "support". Indicating that you agree with something is not considered spam. Also, in the future, when you report a situation, please stick to the template on the first page and refrain from editorializing about the situation. Thanks!
That's not spam, Dong U Dead. There was someone with that display name who played forum games. I imagine the person who posted the name didn't realize that it is now a previous display name.