For sagging’s many detractors, kids wearing their pants below the waist — or below the butt cheeks, in the case of the look’s most fervent adherents — has doubled as a reliable shorthand for a constellation of social ills ostensibly befalling or propagated by young black men. A dangerous lack of self-respect. An embrace of gang and prison culture. Another harbinger of cultural decline. Those are all things that people say about hip-hop, which helped popularize the sagging aesthetic. And if those are the presumed stakes, it’s hardly any wonder why opposition to sagging sometimes has the feel of a full-on moral panic.