We’ve recently discovered that there were about 25 comments mistakenly marked as spam — and they were mixed in with the usual real spam that touts fake pills, pleas for help from Nigerian princes, dating sites and the like. I’ve had to set the filters to be quite strict, as SFN is a popular destination and scammers want to piggyback and take advantage of that and flood the place with free ads for their particular brand of crap.  Unfortunately, it catches legitimate posts from time to time and those comments can get lost in the mix until one of us finds the time to go and dig them out and sets them free.
So if you write something and you see that it is tagged for moderation and then the post doesn’t appear after a short while, then please take the time to drop an email to the site’s admins so they can take a look.
Thanks.