I tend to log out of msn or email or whatever by habit. I'm logged permanently into this place though.
To be honest though if I actually wanted to hide shit from Amy I wouldn't even have to log out of things. She sees computers as a sort of necessary evil these days, as opposed to a source of information. She knows who you fuckers are, although not usually by name (ie: "tattoo artist from Philly", "Aussie dude who sent us American Hardcore", "dude who lives in Baltimore who just went to Saints & Sinners", etc.), but has no interest in sitting around chatting or posting or any of the other shit that entertains me online.