Great poll!
When I first came to this forum I took things literally and thought the critique section was where one would post poems they wanted feedback on and the other main poetry forum just for sharing unless someone asked specifically for feedback. I was hesitant to offer feedback to poems posted there (the reg section). I eventually figured out that wasn't the intention but still hesitated to offer feedback unless asked or if I knew the poet posting consitantly wanted it.
As for the poll, I'm voting for option one (but if there's a tie I can be swayed with chocolate,.. dark please

.)
I really think if someone wants suggestions (on the main board) they should ask for them rather than expecting them, but also shouldn't get bent if they get them without asking. (did that make sense?) It should be clearly stated that they may get feedback when they post. Perhaps if they just want to share something, they can link to it rather than post it? (just brainstorming)
Sometimes a member will post something they have already published, maybe years ago, and I would asssume that's really just for sharing because it seems a mute point to get crit unless there's something they want to improve on or want a new perspective.(but I've seen people critique these poems too) Then they should ask for just that. Or open it for discussion rather than critique? (there is a difference, yes?) But I can't see someone saying, 'here's my published poem, please don't crit, just pat me on the back.' I guess perhaps they could also just link to their poem if they're just sharing their accomplishment.
New members may not be ready for the kind of critique that can be given here and may not be clear (like I wasn't) about where to post or which poems to comment on. These things just need to be more clearly stated, whatever the contention is.
As for the critique section, I understand the original intention is for publication but some of us may never gather the ummph to get that far, but may still want the critique and the extra password protection offered there.