My suggestion is to limit the number of stories that can be submitted and/or made popular in a day. So if one story makes it to the front page in the past 24 ho

My suggestion is to limit the number of stories that can be submitted and/or made popular in a day. So if one story makes it to the front page in the past 24 hours, news submissions from the same site are disabled. The time period can be manipulated (12 hours, one week, whatever). This will limit the effect of TC and a few other sites that are very frequent front-pagers without merit IMHO.