” And since we’re looking at the mitzvah of chinuch, would it not be prudent to teach talmidim to be respectful of someone’s tefiloh by not disturbing him in the middle of it? “
NO it would not be prudent they teach in yeshiva to disturb as much davening as possible…
Also they teach especially when collecting to be as annoying as possible so the people that don’t want to give have a good excuse…