I think you are harsh on "that noob"
I remember when I got back here, it took me months to be able to have an idea of what is worth what. Once you have it figured out it can be simple, but I sympathise with him, because until you understand the concept and the working of mods that go with each other and not, until then your only bet is trial and error.
While I do agree that it's better to post 5 items in one thread, instead of 1 thread for each items, it's by no mean that dramatic if he makes 5 threads, that are most likely destined to go down in the selling page fairly quickly, it's not like it's that big of a bother to ignore them.
I am sure that if someone kindly contacts "that noob" and guide him on proper forum etiquette, he could improve his posting habits in the future.
But considering the quality of threads lately on the Demise forums, I fear that not many people have good forum etiquette lately.