Those who use this forum and other forums similar to this for advertisements, be gone!
It is next to impossible. The companies understand the value of participating in these forums. They realize that students trust the information to be found here. They will always try to work the system and figure out a way to advertise, without being too obvious about it. I think that it is more of an issue of allowing them to properly participate in the forum. Perhaps create an advertising thread where they can advertise and provide responses to general qquestions? Just an idea. Since we cannot successfully ban them then, we should learn to exist alongside them. That way we all win and live in a cooperative manner.
The opinions are that of the author's alone based on an individual capacity. Opinions are provided "as is" and are not error-free.