They may have been in their hands all along, there are accounts here that come alive at various times, like election time, and someone then will post 24/7. So they are being operated by several people not just a single person.
I thought of that as well.
Could be there are several sign-ons being operated by one poster, with a political agenda.
That would explain why the original poster says several old logins, seem to have become active.
Maybe it’s just one guy (or girl).