These men have obviously not been exposed to women in this kind of environment and in all probability are not well educated or have much world knowledge. They have probably had limited interaction with women and therefore do not understand how to interact with them. If they have made you feel uncomfortable and you have the opportunity in a public area, turn around & ask them to stop. Show them that you are human and that you have intelligence. I believe they see woman as some kind of strange animal in a petting zoo and have not had enough experience with women to know otherwise.