Sometimes, when a thread gets heated for example; a notice geared to appear above that particular thread (rather than the whole node) would be helpful. Is this possible? Thanks.
The notice criteria does not allow for individual threads but you could use an ad template and a conditional statement utilising the thread ID to display a message (which wouldn't be dismissible).
I've got thread reply banner add-on which allows a message with bbcode to appear above the quick-reply and 'more options' view for exactly this reason. This is editable by moderators (or whoever has moderator permissions) rather than requiring template edits by admins