So I have some bad news: there's no system to stop abusers from taking control. Any system you invent can be hijacked by abusers because that's what abusers do-- hijack systems of security and position themselves between their victims and their victims' necessities.
Everything else aside, you can familiarize yourself with abuse tactics and position yourself against them wherever you see them. Read "Why Does He Do That" by Lundy Bancroft as a good primer.