Check below to see which posts comes into this category :
A post with 2 or less words
A post which is illegible
A post that makes no sense
A post with only smilies
A post with excessive use of smilies
A post with excessive use of caps (shouting)
A post "advertising" other free hosts
A post with only question/exclamation-marks
A post with excessive use of question/exclamation-marks
A post with no relavance to the subject
A post only stating that the previous poster is spamming
A post which contains xxx contents
A post repeated in same thread
A post repeated in other threads(cross-posting)
A post which is meant to insult or hurt other member's sentiments
A post with links to websites or services, not relavant to the topic
A post with no explanation of why or why not you like/do/want/etc. something
A post with links to websites or services, of which you have undisclosed affiliation
A post for no apparent reason, other than increase post count
A new thread, identical to what someone else have already started in that forum
A new thread, without a proper subject description
A post insulting or hurting any other member by means of words, pictures or graphics is also spamming.

These all are called SPAM and will result in warn!