A long time ago, someone used to get on my case about leaving my character logged in. I didn't feel like this was a big deal, I liked to read the backscroll or answer pages, etc... but they felt like 'no one ever knows if you're really there or not' and made me feel like it was Not Cool.
So then I felt bad whenever I walked away and went idle.
So to avoid that I only ever logged in if I thought I was 'really' going to be there.
So then I was logging in less.
And eventually I wasn't logging in at all.
My take away, don't make people feel bad for logging in.