>>4In addition to filtering common names, common phrases could be a trigger to hide the post (or thread, depending on the case). An example could be filtering the phrase 'yellow scarves', for example.
Although if it were a global filter (instead of a user based one), it would have to be very careful on what words would trigger the filter, since there's a possibility that the phrase might be used in correct context, like in the DRRR thread in animation.