diff --git a/adjuster.py b/adjuster.py
index 06a4e04e52b6ed49899e91657da3ce23bed02a56..0f4c34f91104035bbe850922cabfca331c220779 100755
--- a/adjuster.py
+++ b/adjuster.py
@@ -72,7 +72,7 @@ define("prohibit",multiple=True,default="wiki.*action=edit",help="Comma-separate
 define("real_proxy",default=False,help="Whether or not to accept requests with original domains like a \"real\" HTTP proxy.  Warning: this bypasses the password and implies open_proxy.  Off by default.")
 define("via",default=True,help="Whether or not to update the Via: and X-Forwarded-For: HTTP headers when forwarding requests") # (Via is "must" in RFC 2616)
 define("uavia",default=True,help="Whether or not to add to the User-Agent HTTP header when forwarding requests, as a courtesy to site administrators who wonder what's happening in their logs (and don't log Via: etc)")
-define("robots",default=False,help="Whether or not to pass on requests for /robots.txt.  If this is False then all robots will be asked not to crawl the site; if True then the original site's robots settings will be mirrored.  The default of False is recommended.")
+define("robots",default=False,help="Whether or not to pass on requests for /robots.txt.  If this is False then all robots will be asked not to crawl the site; if True then the original site's robots settings will be mirrored.  The default of False is recommended.") # TODO: do something about badly-behaved robots ignoring robots.txt? (they're usually operated by email harvesters etc, and start crawling the web via the proxy if anyone "deep links" to a page through it, often because sites log their "Referer" headers and --redirectFiles can cause the browser to send in-adjuster Referer headers to the site for image requests (--renderOmitGoAway can also result in Referer headers: that one could be addressed by redirecting to an 'air lock' URL before providing the link out to the site, but the problem with --redirectFiles would remain))
 
 define("upstream_proxy",help="address:port of a proxy to send our requests through, such as a caching proxy to reduce load on websites (putting this upstream of the adjuster should save the site from having to re-serve pages when adjuster settings are changed). This proxy (if set) is used for normal requests, but not for ip_query_url options, own_server, fasterServer or HTTPS requests.") # The upstream_proxy option requires pycurl (will refuse to start if not present). Does not set X-Real-Ip because Via should be enough for upstream proxies.