User-agent: *
Disallow: /sub/obj_
Disallow: /sub/grp_
Disallow: /sub/ad
Disallow: /sub/rss
Disallow: /sub/notice
Disallow: /sub/sign
Disallow: /sub/unsub
Disallow: /sub/activate
Disallow: /sub/invite
Disallow: /sub/publish
Disallow: /sub/exchange
Disallow: /sub/show
Disallow: /sub/topic