I've been trying to think of things that I don't want any one to know about, and I can't think of anything.
There are plenty of things people would make fun of me about, like being obsessed with online chess (I am truly an addict), but I don't care what anyone thinks about it. I fully disclose it.
I listen to a lot of metal and hardcore which is taboo by much of societies standards.
Oh, wait, I got something after sitting here intently for 20 minutes staring at the screen in deep thought. I like a lot of Don Henley's music. Wow, that's downright embarassing and shameful. Okay, yeah, that I really wouldn't want too many people to know about.
It would destroy my street cred.
"Facts are stubborn things; and whatever may be our wishes, our inclinations, or the dictates of our passions, they cannot alter the state of facts and evidence." --John Adams