Here's the section on this from the forum guidelines:-

Disruptive Posters:-

Since these forums began there have been posters whose sole purpose is to prevent these forums from fulfilling their purpose. Some of these are obvious, and should be ignored until the moderators remove their posts. For others, if you doubt the sincerity of a poster, then by all means contact the moderators at moderators@elitemail.org, but please leave your suspicions off the forum. It is better for an insincere poster to remain undetected, than for a sincere poster to be wrongfully accused.

So, either the disruptive poster (troll) is obvious, so you should ignore them until a moderator comes along to clean up the mess, or it's not obvious, in which case you may, if you wish, contact the moderators privately to voice your suspicions. For the obvious trolls it is bad enough having their mess all over the forum, without additional posts saying the bleeding obvious.

Let me know which part of this is not clear to you.