how would you hide the fact of being online? if you're not logged in, you're offline, and then you're indeed not online.
preferences -> hide online, or something like that. but yeah, a lot of people just don't want people to know when they're online, and so they've turned it off.
the smilies only work for those who want to appear online, so what's wrong with changing avatars that do the same?
besides, if people can be bothered putting in the time to reply to an idea that they don't care about just to say so, i'm sure there will be people who can be bothered editing their avatar for offline mode

it's not a concern, it's just a thought that's really of no consequence. just might be fun for some. it's not a problem if it's not easily done.
but of course I'm open for any improvement when someone sends me better images.
i quite frankly don't care enough to send in new ideas for the smilies we already have, but maybe someone else will?
julz