I agree with you, Luke. The idea of the rapture is a pure Protestant invention that has been around for 40 years, maybe 120 according to some sources. It’s garbage. This planet Niburu is also, in my opinion, a bizarre hoax.
What are not bizarre hoaxes, however, are apparitions of the Virgin, several accompanied by signs (most notably the Miracle of the Sun at Fatima and the ongoing bizarre blinking of the sun at Tre Fontane–videos on YouTube). Akita, La Salette, Our Lady of Good Success, Fatima, Our Lady of Revelation: She said the same thing over and over. Namely, that Satan will appear to be on the verge of winning, that there will be gross iniquity, abomination of marriage and family and that the clergy will be silent or complicit in some cases. Most frightening to me is Our Lady of Good Success: this apparition was 400 years ago, the message has been on the record for centuries and She was talking directly about our days and she mentioned priests silent when they should be the outspoken defenders of the Word (anybody here heard a homily about contraception, abortion or marriage in the last 35 years?).
I can understand battling to debunk–especially when it is coming from fellow Catholics–the Niburu stuff, Medjugore (which I think might actually be Satanic as in no other case has Our Lady been on-call and available for quick consultation with “seers”), rapture ideas, a Christ and alien combination, some sort of anti-Christ as a sorcerer, et. al. Yes, all of those notions are absolutely inappropriate and even sinful, especially for Catholics who ought to know better.
Again, if people want to get worked up they can reference the apparitions I mentioned along with the visions of Pope Leo XIII and Pius XII. Throw in Fathers Gary Thomas and Gabriel Amorth talking about demonic activity (plus Pope Francis calling for exorcist is in every diocese). If that stuff doesn’t get you to confession but a fantasy planet does then you might need to do a long examination of conscience.