Should, but laws outlawing toplessness are almost always upheld by the courts, unfortunately.
“Protecting the public sensibilities from the public display of areas of the body traditionally viewed as erogenous zones — including female, but not male, breasts — is an important government objective.”
Am I misunderstanding what pull cords are, or why not have it so the two strings can separate easily? The two strings in my blinds “snap” together so that it’s easy to raise/lower the blinds, but the strings separate very easily from each other if applying force in any other kind of way (would be impossible for a child to accidently hang themselves with it for example)