I meant "Viewing entries in ?style=site, is there any place on an entry's page that has what the security is?", not "are there styles that don't show it?", but then I looked more closely at a locked entry and spotted the lock icon. So it's not that there isn't a place, it's that I overlooked it (twice)!

Maybe the note could go right under the date? "This entry will stop being public on 2012-10-15" or the like?