JSF security question - how are public methods protected?

I'm somewhat new to JSF, so pardon my ignorance if this is a silly question.
Let's say you have a bean with several public action methods. You create a JSP and specify some of those methods as "actions" or "actionListeners".
How well protected are methods that are not exposed via the JSP? Is there anything stopping people from analyzing the rendered HTML, seing how it binds to a method "${bean.editABC}," and modifying it to the equivalent of "${bean.deleteABC}," for example?
Thank You.

Does they appear in the HTML source anyhow? I've never seen it.

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JSF security question - how are public methods protected?

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