Clip-on suspenders, like clip-on bow ties, are appropriate for Halloween and Mardi Gras--not to mention they're hard on the trou fabric and are best reserved for denims and other workman-type clothes.

I am inspired by your concept of fashion morals. This could be the start of a whole new field of enquiry; who knows where it might lead, perhaps a Fashion Supreme Court. As for suspenders, or braces, ...