Being unfamiliar with this software, the only advice I can give is stay on top of who signs-up to join the community, otherwise you'll get swamped by spammers & other idiots who, from what I've been able to tell, use the site to harvest e-mail addresses from - see one of my other sites,
http://blacklist.jdaltpol.co.uk to see how bad it can get (and those one's are just a small portion of the ones I could be bothered to deal with over the course of a year or so).
If using LINUX / UNIX based hosting (like this site runs on), check out this tutorial from Javascript kit for a handy little trick to keep them at bay:
http://www.javascriptkit.com/howto/htaccess.shtmlI hope these links will be of some help to some body that dose not know much about files and is looking for a little trick or two....
I found some pretty Interesting articals here.....Enjoy