Middle school students pushed past a “wall of teachers” this past Friday to walk out and protest their school board’s ban on a musical composition honoring Stonewall veteran Marsha P. Johnson, issued earlier in the week. Administrators had placed the school under a “cautionary lock and hold” that day to prevent the walkout. In a message to parents, Riverside Middle School in Watertown, Wisconsin, said on Friday morning that there was “a rumor th…