[kh99]

Unfortunately, I don't see how you can do what you want to do using that hook, and there really aren't any other hooks in the rss poster code. The only thing I can think of offhand is if you're posting the item as threads, you might be able to use a hook like threadfpdata_doset to set an error as if one of the fields were invalid, then when the rss poster calls save() to post the thread, it will fail. But to do that you need a way to detect that it's the rss poster cron job creating the thread, and you also need to be able to check the source.

Of course editing the vb files is always another option.