I would choose staying silent but not because they wouldnt care. I work at a crisis center that teaches adults and children the concept of dont talk to strangers, even if something is wring you talk to someone you know and trust. we do this because many times when its a stranger that has harmed or obducted someone it is because the stranger has sensed or has found the victim to be vunerable in some way, it could be they are distracted and not paying attention to their suroundings or it could be because they have a problem.

so I practice what I preach so to speak ...when out in public (male or female, mentally challenged or not, physically challenged or not) a person should always appear to be aware of their environment, people places and where they are, they should always when ever possible be with someone else, I know its not always possible but act like you know what you are doing, where you are going and like everything is fine. if someone approaches me, when I am out and about alone, I act like they are not even there, while at the same time knowing exactly where and what they are doing, just going about my day.

some people call me paranoid but I dont care. I cant teach about stranger danger, be a therapist for clients that have been hurt by strangers and known assailants if I dont keep myself safe first. sorry.

I remember this one time when the crisis center was working in one of the city schools. the teens were rowdy and took everything as a joke, there was a lot of heckling saying stuff like this is hypothetical , these scenarios wont really happen to us, don't worry ladies when you are in danger we will come protect you and other inner city type crap.... until one of their own was abducted and killed by a stranger. Suddenly in our reception area was these same group of guys and gals that were heckling us during the school assembly.

doesnt matter to me whether the situation is hypothetical or not....when Im out and about, I keep silent to strangers not because they dont care, but because its just basic self care.