Do you remember blocktogether? ISIS supporters use now this tool to make a giant blacklist, and possibly a publicly curated list of people ISIS should target. And for some reasons, the list of GamerGate related twitters accounts from ggautoblocker list was added to the ISIS blacklist.
Are you ISIS blacklisted? Check it! http://kuffar.net/
In addition, Jacob Hoffman Andrews aka @j4cob, creator and maintainer of this tool is a EFF staff member: