Saw this in a men's bathroom above the urinal in a dive bar.
Here's why it's effective:
It's aimed at dudes.
Every dude in that bar will see it.
It says there is a group of people who confront rape and warn potential victims. And it makes it clear that they are easy for victims to contact.
It contextualizes rape around alcohol, both by being positioned in a bar, and calling out a tactic of rapists pushing alcohol on potential victims.