I was flagged last week by a really odd accounts which has a database link in its bio of all these other accounts on a master Steem flag list . Apparently they flag content from users who follow a myriad of different accounts which someone in the steem ether has gotten into a grudge with.
That user is https://steemit.com/@niquetarace and the link for this list is here: https://jpst.it/1gMi7