Mark all as read

Is it possible to send a warning/confirmation before marking all as read? I always hit that button on accident (when I intended to create a new topic mostly), and all the unread forums are lost...

[deleted]

Some CSS for those that never want to mark all topics as read, such as myself.

#subnav-mark-all-as-read {
    display: none;
}

I too hit this button by accident. I have read almost no threads so far.
Is there a way I can mark all as unread?