Perhaps we can't adjust his mindset NN, but we can adjust society's mindset around him.
So that a woman who is raped in the dark, on her own, after more than one small sherry doesn't feel so bloody ashamed of herself for putting herself in that situation that she actually goes on to report the rape, instead of keeping it secret.
So that she is heard and supported by police and the CPS, so that everything is done to catch her attacker and bring her to trial - remember the case (in London?) where a couple of PCs were sacked for ignoring a notebook full of sexual attack complaints?
So barristers don't try and plant the seed that women ask for it because they were walking home alone.
So juries completely disregard the circumstances around a rape accusation (if the woman was drunk, alone in the dark, wearing a short skirt) and hand down verdicts accordingly.
It isn't just about the effect of the poster on a potential victim's behaviour. It is about the messages we send to society as a whole about rape.
A very short advanced search on this site will pull up a number of threads which attest to the examples above still happening, here, in the UK, in the 2010s....