Because it's clearly something you can just say "Hey there's this stupid website that is super popular in the area, don't go on it" without creating interest, or even better "Hey, there's this stupid website that is for some reason popular in the area and once you join it you get stuck with these stupid dreams that are more than dreams and not only that, you can end up waking up with items or worse, injured from them" without sounding completely insane and needing to be locked up in a nut house.
Newsflash, Spencer. I'm not an idiot, I know exactly how it sounds because I wouldn't believe it if I haven't been dealing with this for over a year now. This website isn't something I would wish on an enemy, let my best friends and it made more sense to say nothing than put the idea in someone's head to want to investigate it.