So women shouldn't try to stop themselves from being raped.
It depends on the situation. However, this stupid device might keep a woman from being raped, but it's not going to protect her from being tortured and beaten to death. Forced sex is only an expression of the rapist need to dominate, degrade, and humiliate their victim. Most rapist feel they have little or no power to control their lives. Rape gives the man "power". He has the power to hurt you sexually. He has the power to kill you afterwards. He has the power of forcing a woman into an act she does not want to do. His motives don't really have anything to do with sex.
No it won't save her from being tortured or killed, but robbers do the same thing. There is a distinction between violent rape that seldom occurs and acquaintance rape which occurs all the time. Probably 100 to one. Date rape includes rape by use of date rape drugs. Mostly its a friend, ex boyfriend, guy who got the wrong message or something like that.
Acquaintance rape end up in he said she didn't say no, or said yes, or indicated yes by her behavior. This kind of device would put an absolute end to that. I would prefer if women simply were armed and put an end to the rapist permanently but that's not going to happen.