@Connie_McLennan, thank you for staying on top of this! I am sorry that any of your time has to be taken up in fighting this.
The software used for this forum is uniquely secure against automated spam, which is a scourge of most forums, however, as Connie has pointed out, these spammers are committed and spend the time building the posting history required to earn forum trust. Because of this, the software is not able to identify their posts as spam.
Our only recourse then, is for all of us to flag any questionable posts, as Connie has requested. Once flagged, I can further investigate and then disable both the spammers’ DPW registrations and their ArtTalk accounts to keep them from further posting.
I have already done so with the three accounts responsible for all the spammy posts so far identified.
Thank you in advanced for everyone’s help with this!