who makes your bs radar go off?

I tend to get strange feelings about certain people: friends, celebrities, coworkers you name it. It’s something I can’t necessarily put my finger on but they just seem off, fake, or dangerous. For example, Mr. Beast always seemed super off to me. With the recent stuff that came out about him I wasn’t even surprised. Same thing with Cody Ko. I liked him at first but something felt fake. Anyways, who makes you feel like this?