Is not signing out of the chat room sort of like not making your bed?

I confess I don’t like chat rooms but once and a while I take a peek if someone is there. I noticed that sometimes people sign in, but they don’t sign out, even though they are clearly gone.

It doesn’t hurt anything, but wouldn’t proper chat room discipline include signing out?

I think it’s sort of like not making your rack or hanging up your towel.