Hi Matt!
Hopefully you'll be a member here long enough to witness this, but there are people who sincerely believe the things that the original poster is expressing, and every now and then, we have one join us here in the forums.
I personally find it valuable to answer such posters because the Bible says, "Out of the abundance of the heart, the mouth speaks." (Matthew 12:34.)
Sometimes, the craziest stories in life are the ones that turn out to be true, and I try not to dismiss a story unless I'm totally convinced it's not true.
In the meantime, engaging with and getting the person to talk is the best way to get them to show what's on their heart, and once the cards are on the table, it's up to the readers to decide what information they do or do not want to take to heart, and whether or not they want to answer any further.