The intention of this thread is to create an unofficial database of known factorio trolls and griefers, so other players can avoid and/or ban them before they get to do harm.
UPDATE 6/1/18: updated list, reworked parts of thread, and fixed syntax errors in the JSON file
[Added by Koub] : This list is purely unofficial. It is run by a player with updates from the part of the community that's active on this forum. It is not endorsed by Wube software.
Please be advised that this list is purely player-run, and as such, may be prone to error. If you feel that you were placed onto this list wrongly, please contact me.
As of now, I will be unable to add anyone to this list without either a screenshot or a log. If you were griefed but forgot/weren't able to take a screenshot in time, please post to this thread with a log file attached, or it pasted in. If you post a ban list file without any context, I'll be unable to add those people onto this list.
If possible, please also supply the IP of the person in question so I can add to the JSON banlist file.
Before reporting someone, open the spoiler below and use CTRL-F to clarify that the user is not already on the list.
Confirmed Trolls and Griefers