That is a property on the mojoRating control. 

If you allow anonymous voting then automated bots may click the rating over and over skewing the results (or an anonymous user may do the same). We capture the ip address of anonymous votes and we don't let the same ip address vote again until the duration specified in this setting has elapsed.

Hope it helps,

Joe

Hi,

After looking at it more closely, I see it is not using that property, but instead is using a setting from Web.config

ContentRating.RateContent(
                siteSettings.SiteGuid,
                ContentGuid,
                userGuid,
                rating,
                emailAddress,
                txtComments.Text,
                SiteUtils.GetIP4Address(),
                WebConfigSettings.MinutesBetweenAnonymousRatings
                );

I will remove the unused property.

Best,

Joe