If they're under 21 probably, yeah. At 21 and above, like always, you have to be careful of what situations you put yourself in. That's not victim blaming, it's reality. Malicious people will always exist and women will always be at a physical disadvantage.
>What about saying that if they stay with a male guardian, they will be safer than if they don't? If that statement is true, should it be an official policy statement made to increase safety?
No, it should not be a rule because the government should not limit a woman's right to travel as they see fit. Don't you see the problem with this line of thinking? Safety at the cost of freedom is a mistake.