IsWarningAbout

This function takes a single FormList parameter. It returns 1 if all of the following are true, or 0 otherwise:

• It is being run on an actor.
• That actor's current "guard" AI procedure is directing them to warn the condition parameter not to trespass into a restricted area.

Further reverse-engineering is needed to know how the condition parameter is used (e.g. whether it's a list of ActorBases, placed Actor refs, Factions, or something else).