Privacy online? X3 Pfft.
The most I do is make sure my phone number stays off the internet and my real name is disguised on most of the websites I visit on a daily basis. I usually don't post my YIM screen name anywhere, either, 'cause I don't like the random IMs I get from people I don't want to talk to. XD They only get my AIM screen name. 'Cause I hate AIM, now.
But around my family?
I password lock everything but my flash drives. And the only reason they aren't password locked is because I don't know how.
o3o I mean, yeah, I don't have that much on my computer / lappy that would get me into trouble anymore, but I still don't like my family poking through my files. (I compared it to leafing through someone's underwear drawer to my parents, but they don't seem to think that's out of bounds, either, since I'm their daughter. Which is creepy.) And I don't much appreciate some of my friends flipping through them, either. X3 It's common courtesy to leave a person's personal folders alone unless told you can touch them, but some people just don't understand that.
...My printed out stuff, though?
Pssh, I don't even bother hiding that stuff anymore.
I'm pretty sure everyone in my house knows where I keep my printed-out fanfictions, now. They just don't bother bugging me about it anymore. XD
"Oh, that your porn, Selby?"