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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.
The best defense against abusers is to become an anti-abuser and to break up the systems of exploitation they depend on wherever you encounter them. This means thinking on your feet and being willing to question what others accept at face value.
The more complicated and multi-layered the system, the more positions there are to be infiltrated by abusers.