No, I said walking in hallways, not middle of class. High School hallways are usually loud, with some type of shouting, since it's a throng of teenagers changing classes and socializing along the way. I don't believe for a minute that you'd expel cheerleaders for carrying signs and shouting 'team spirit' in the hallways.
You interpreted the two scenarios the same way, even though they're vastly different, because you have an authoritarian bias. Then you use that to wiggle out of any deeper discussion about free speech and its limits.
Seems to me you're mixing violence and speech, in the same way Lewk conflates rules and rule-breakers....which doesn't do a damn thing to address the underlying issue of bias. The UK and US might have different legal definitions of Hate Speech or Hate Crimes, but we shouldn't get so caught up in that rhetoric that we ignore/deny that racism exists!