Posts that are off topic or rude, as stated by Sora!, as well as posts that simply don't contribute to the topic - eg. someone posting nothing but "lol" is considered spam. Someone talking about the price of fish at their local dairy in the middle of the X-2 forum is spamming. For the most part it's just a case of "use your head and you'll be okay" though - we'll let you know if you're doing anything wrong when it comes to spamming long before we decide to take any serious action.
