I'm not afraid to out myself as an asshole. They're gonna figure that out anyway. At least they'll know me as an asshole with a healthy bullshit filter.
In all seriousness, you are never wrong for correcting the delision, nonsense and woo you encounter in your daily life. In my opinion, you're only wrong if you accept that which you know is bullshit.

Even a knowing smile and shake of the head can illicit a tirade. I now know how the Homo-Sapiens must of felt.

Been there. Its usually not helpful, but I've been there brother.

I bite my tongue and walk away shaking my head when the stupidity gets to be more than I can handle, usually.

I have to admit that I dumped a long time very good friend over it. She told me about this great new book "The Secret" based on the philosophy that wishing for things makes them happen. There had been others things, but that was the last straw.

Not yet, I get pretty amazed though.

No. I have not lost my cool, but I have a coworker who raves about essential oils. It's only a matter of time. For now, I just point out that they do nothing but offer fragrance.

Rarely, but yes. And rather than lose it, I usually make the person look pretty silly.

You have to speak up. Otherwise people might think you agree, or at least, don't disagree.

Yeah, I've given lectures on climate science, Chem trail bullshit, homeopathy crap and healing with crystals nonsense. Sometimes, you can only put up with so much.