People post spam for the sole purpose of getting a reaction out of you, regardless of what that reaction is. The act of replying encourages the behavior. Also, saying "don't post spam" could be considered backseat modding, also against the BBS rules.
uglyslug
If the thread were still in existence, I could probably shed some light on the situation. Seeing as you only have 100 posts, you really don't have much of a say in this and best trust the experienced moderators.
OMGx
This is true.