Cheer pr0gr4mm3r, will give

greg — Fri, 18 Jul 2008 17:05:00 +0000

Cheer pr0gr4mm3r, will give that a try....

You can tell who the bots

pr0gr4mm3r — Thu, 10 Jul 2008 03:40:00 +0000

You can tell who the bots are by the useragent, and you can redirect others by your cookie idea. Try something like this in your .htaccess file:

RewriteCond %{HTTP_COOKIE} !^.*(age_confirmed).*$
RewriteCond %{HTTP_USER_AGENT} !^.*(google|yahoo|msn).*$ [NC]
RewriteRule ^(.*) /path/to/confirm/page.htm [L]

You may have to check my reg expression, but this should assume that you either have to be a bot (may have to add to the list), or have an active cookie named age_confirmed.