If only people would read. From the Thinkprogress link
I see that as a perfectly rational viewpoint. On one hand this way of detecting roofies is great, but on the other hand it's a shame that women would ever have to do so.
I don't see this as a mutually exclusive thing.
There are statements which I do disagree with like
According to Alexandra Brodsky, one of the founders and current co-directors of Know Your IX, a survivor-led group working to address campus sexual assault, well-intentioned products like anti-rape nail polish can actually end up fueling victim blaming. Any college students who dont use the special polish could open themselves up to criticism for failing to do everything in their power to prevent rape.
That would be Brodsky's perspective and there may be people who think like she suggests but I believe she's projecting. If a woman was raped I don't know anyone who would say "tsk, tsk, it's her fault because she wore the wrong nail polish". That's not a good enough reason to oppose a means of protection.
The world is not as it should be and if someone feels more secure for using tools to protect oneself then it is not the right of some (note some) feminists to criticize their choice.
So "feminists think this or that" isn't relevant, because their ideas on this are different. As for myself I'm in the "it's a shame there's a reason for this at all".