Namaste Grienlord,
Welcome to the Arya Samaj Forum!
Generally the information on this forum is reliable. Of course, members are free to start new topics of their choice, and, as a result, not all of them necessarily reflect the ideals of Vaidka Dharma. But as far as I know there is no advertising or blantant 'spam' on this forum. If it appears, it is deleted as soon as I or one of the moderators notice it.
If you spend a little time here, you will quickly notice the difference in posting styles between members. Some take it seriously - and such members are valued greatly - and some just throw up whatever crosses their minds at the moment. I have been known to delete posts or even entire threads which display poor content. But generally I respect member's topics of discussion, even if I don't personally agree with the direction of the discussion itself.
I hope that answers your question. 
_________________
Namaste,
Shishya
ॐ
ॐ सह नावतु । सह तौ भुनक्तु । सह वीर्यं करवावहै । तेजस्वि नावधीतमस्तु मा विद्विषावहै ॥
"Together may we be protected. Together may we be profited. Together may we do a hero's work. May we learn intelligently. May we never hate one another."
-Brihadaranyaka & Taittiriya Upanishads