Warning! Signs Are Not Enough to Save Beachgoers from Deadly Currents | Hakai Magazine

Author shows evidence that people either pay little attention to signs about rip currents or don't understand them. Information isn't working to warn people away from these risks and the consequences are often fatal. Author doesn't suggest any coercive or paternalistic measures (like no swimming at beaches with rip currents), and doesn't quote anybody who does, but we can imagine that some people would do so. She quotes people working on better methods of information (such as a rating system for degrees of danger) and "engineering beach-access points [to] guide people to swim in safer locations" (basically, nudges). 

Note that there other cases in which people don't heed warnings of danger, for example the warnings on cigarette packs. One difference is that people who smoke know and understand the warnings, and almost always consent to take the risks. But people who swim at dangerous beaches don't know and understand the warnings, and almost never consent to swim in rip currents (e.g. for sport of thrill).