So today, I come upstairs 10 minutes early from working out, and a girlfriend is in front of my Mac.
She's absolutely startled that I came up early - and I am (a little) panicked that she's in front of my machine.
From almost across the room, I can read that she's logged in under her own (set up by me) account. (A huge, huge benefit of Unix based OSs) She says that she just wanted to see some articles and logged in on her own...
Ok, I don't hide it, but I also don't need to have a girlfriend finding it either....