Hello, Traci.
Here at the Goodnight Library we don't do anything to discourage online game play, with the exception of pornographic or ultra-violent content. We have had to run people off for playing a Texas Hold 'em game that popped up a pornographic shot between hands (poor choice of words, I know

)
That being said, our computer use policy prohibits stuff like that, with clearly stated consequences for violators.
Here's a link to our policy in PDF format. Additionally, on our
Children's Services page and on our
Teen Services page, we list several online game sites that are age-appropriate and are always on the lookout for more.
As far as managing the content, I would recommend building an open-source appliance. You can even use an older PC, put
IPCop on it with
Dansguardian and set it up to allow all content but the porno stuff. You'll likely have to manually key in okay sites, for medical professionals and students. We have one EMT that goes to
www.hultgren.org, a Kentucky EMS site, that most parental controls will filter out as questionable due to anatomical content. And that brings up another point to consider: parental controls on the children's computers. You
could use Internet Explorer's, but they are rudimentary and easy to get around. In fact, parental controls are nearly useless if the user goes to an anonymizer site like
kproxy.com or
anonymouse.org. The controls see the anonymizer site's address and don't pay attention to where the patron goes beyond that.
I hope this helps you out, and good luck!