Actually, I don't think this is victim blaming: like it or not, drunk people are more vulnerable, and the highest proportion of rapes happen to women.
Yes, absolutely, it's not OK to rape someone because she's drunk, because she's wearing a short skirt, because she's on her own etc etc But reminding women we still need to take care because sexual predators are out there? I don't see anything wrong with that.
I should be able to leave my home unlocked, go to work, and come back, and find my computer and camera just where I left them: because it's my home, and it's shit to steal, right? But the reality is, there are people who break into others homes and take their possessions - it's not "victim blaming" to remind people to lock up and leave their windows shut when they go out.
Likewise, I should be able to get out of my tree (or not touch a drop), go out in the city centre, walk the mile home taking any shortcuts I please, even if they aren't lit, wearing a mini skirt and a bra top, and not be mugged, have my bag stolen, be held up at knifepoint or raped. However, there are scum out there who will prey on women, drunk or sober, and if fewer people are around (because, y'know, it's the middle of the night) then it is sensible to take more precautions than I might if it was a sunny afternoon and all the kids are playing out.
Equally, when I was in my teens and 20s, "date rape" hadn't been coined: however, despite it being a solid part of the lexicon now, there are still men who think it's OK to fool around in a bar with a girl, go home with her - and then have sex with her even if she's not capable of consenting, or has passed out, or withdraws her consent after a bit of snogging etc Absolutely they are to blame - but at the same time, there's no harm in reminding women to be careful and not make it even easier for a predator to attack them, if at all possible.
I live in a city known for its nightlife, and though I have been out approximately half a dozen times in the years I've lived here, every time I shocked at how fucked up some young women (and they are mainly women - the blokes get fucked up by stay with their mates for some reason) get: alone, wandering in the street, trying to entwine themselves round passing (male) strangers, incoherent - often crying, usually barely able to stand. And this is by no means at the end of the night. Fortunately, there are black cabs in our city - so you can flag someone down (the police say it's not their issue), take their licence number and tag number (for safety) and pay for someone's cab home (as long as they can remember their address, and can come to agree that this is the best idea for them): but when a person refuses to engage at all, isn't passed out (so you can't call an ambulance) and just careers off to the next group of people - damn right, they are vulnerable, and there will be creeps who want to take advantage. So I don't see the harm in reminding people to take care of themselves and each other.
[Disclaimer:I lived overseas in my youth, and have been seriously - as opposed to "just" groped/fondled etc - sexually assaulted numerous times on my way home after a big night out, as well as raped at gunpoint by a taxi driver: alcohol, youth and a pervasive culture lacking in respect for women did not a happy and safe journey home make, all too often. I don't blame myself for being attacked - that was the low-life scum who chose to violate a vulnerable woman. I do, however, blame myself for allowing myself - more than once - to get both in the state and the situation whereby I was vulnerable to attack. In all honesty, a poster like this wouldn't have stopped me going out and having a blast - but it might have encouraged my friends and I to be more honest and open with each other about the toxic patriarchal society we lived and worked in, where police wouldn't follow up any accusations of rape if it happened on or after a night out...)