Nefarious game makers appear to be leveraging a chat-based Roblox exploit that results in automatic account bans for unsuspecting users.

Roblox is implementing fixes for a chat moderation exploit that resulted in a wave of automatic bans, but the offenders say there’s more to come.

Roblox’s app and profit-driven virtual currency system enable predators to exploit children, often by trading or extorting Robux in exchange for explicit photos,” the lawsuit states.