Where is the line?

There is an interesting thread on the AKA Forum.Tony Heeschen in Maine was asking about where to find brown ripstop.

After some suggestions, none of which contained links, the AKA President posted that links to help other kite fliers are fine, but "Just don't do blatant outright advertising except in the store section."

That makes people like me wonder, where is the line? How much information about a source is allowed before someone decides it is "blatant outright advertising"? What is the standard?

Now, for the record, it would be great to be able to just Reply to the President's post and ask the question. But it might be reasonable to surmise that if certain people did that (me, for instance) it would be construed as anything but a simple request.