The current moderator evidently supports creation but the name of the forum is Creation and Evolution. The name of the forum is not Creation, nor is it Creation and Creation. If I were an evolutionist and wished to host a forum for people to discuss both sides I would give it the same name. My personal stance on the debate, even as a moderator, is of little consequence to the forum I'm hosting. Moreover, the description of the forum ends with the question: What do you think? This is clearly an invitation for both sides to offer ... well ... what they think. You ask why evolutionists come here to post. The forum name asks what everyone thinks. Personally, I wouldn't ask someone what they think if I didn't want an answer.

It is clear that you think evolutionists should not be posting here -- or at the very least you are questioning their motives for doing so. Having said that, there are forums out there for creationists to discuss amongst themselves exclusively. I would encourage you to seek one out if evolutionists debating here bothers you. Because unless the current moderator changes the forum name (and fat chance of that!) you can expect to hear both sides of the debate.