I yet to see even the most experience sup here on ESMB toss out an appropriate reference for tape speed.
I'll tell you what I used to do with something similar. Sometimes a student would want to chew gum in the courseroom. There's no particular policy against it, but it looks awful sloppy. I would just show the guy the Courses Their Ideal Scene HCOB and say, look, there's no strict policy against it as you are not technically "eating in the courseroom" unless you swallow it. Unstated was "you know what ethics procedures are like in the SO: there's the letter of the law, there's the spirit of the law, and then there's what happens in real life". Your chewing gum in the courseroom runs the risk of ME getting declared for violating the Courses Their Ideal Scene HCOB, and I can't afford the risk.
I never had to push it with anyone.