Disallowing item linking wouldn't stop people from attempting to sell/buy things in other channels and it would just be an annoyance for a lot of people. Restricting new players to anything is a terrible idea.
I have to disagree with this. Playing a GF and being new to D&D I've had to look up so many mechanics on the internet which are mentioned in my skills assuming that I have prior knowledge of them. It took me so many hours to figure out that my mark falls off when I get hit...
Whenever I see a thread with "everyone look at me" in the title I die inside a little. Suggestion/criticism/opinion threads are great but get off your pedestal.