At this point, we do not have a process to validate the quality of news sites. Members may NOT be faulted for this. Prolific news posters are not responsible for scanning every single line of news, prior to posting.
As indicated by you, if some sites are dubious or are posting erroneous news, we shall flag the same in software. Therafter, future postings from that domain are not allowed. This will be an automatic process, and members need not watch out for every single posting.
Thanks a lot for bringing this up.