It's called Copyright Sources, and it warns you what sites we must excerpt, or avoid completely. (I don't think anyone's yet said we can't even create a link to their stuff.)
But it would be nice if it were possible to submit just a link to an article and get back a response about whether or not the source can be used.
What I meant though was that there is a check at post/preview time on the source. It would be nice to have the code that performs that check linked to a button by the source text entry box so you could run it first before going through all the effort of formatting a full post.
I don't know the reasons why other people with membership dates in my era have continued on FRee Republic, but one of the main reasons that I have done so is the high quality of the forum software involved. It just feels more than a little disturbing that I could be about to do something that a trusted old friend doesn't want me to do and I wish I could ask to see if it's OK first.
Does that make sense?