Facebook open group issues?

[Enigma Shade]

I am rather active in a facebook group for artists, however the issue is that it's an open group, so anybody on my friends list can see my posts in this group through their newsfeed. Now, I write and draw horror and other scary things, so there are some people on my friends list that I would prefer not see my posts (primarily family and younger friends). Is there a way to block my posts on this group from appearing on my friends' newsfeeds?
Thanks in advance, guys.

bit of info I think I should add: no, it's not gore horror, just scary images and stories that some facebook friends have made comments about.

[abraXus]

the only way is to add people to your restricted list

http://abrax.us/Facebook/RestrictedList.php

the downside is that they wont be able to see any of your status updates then either