Back to creating ill-will I see.
"Don't spam - Post your message once. If you are not sure if it has posted, check the latest posts page.
Now seems to me that would be one time per thread. Each time a new thread is started you could post your opinion. If one's opinion or facts have not changed then it might look like spam to you, but not to me or vice versa.
I can't be sure of course, but it looks like the intent was to keep repeating the same thing over and over on the same thread. That would be unwanted and meet the definition of spam as I understand it.