It might be worth noting that we do live in a different age. Our culture is hideous, satanic, and pagan, and examples abound of true monsters wearing the Rosary around their necks as a talisman or mockery of God and our Lady.
Therefore it is prudent to wear the Rosary around the neck under one's clothing. We receive the indulgence and our reward in secret, and deprive the world of an opportunity to come to false and unsavory conclusions.
Maybe the USA really is that different but IMHO I think the benefits outweigh any possible misunderstandings, which the context usually makes clear: if a lady works at a gas station and wears a Rosary to work nobody thinks she's some gangbanger. She's reminded to pray, keeps her from sin in conversation, even if it's just out of shame, and some coworkers or people may ask about it and learn about Catholicism.
Also the rosaries I've seen here used for fashion are almost never actual rosaries they're jewelry that looks like a rosary but you couldn't really use comfortably. So that also clears up misunderstandings.
