By linking to a station that most normal-minded people wouldn't have found, you added a gateway for the not-so-pleasant to go to.
It's also advertising. If the people in charge see a stream like this on the Shoutcast directory they can ban that IP but the software itself cannot stop anyone from broadcasting.
If you have issues with certain broadcasts, get the IP that is broadcasting what you find to be offensive, put it in here (for example) http://geektools.com/whois.php
and report them to the abuse@that isp.