On Purim you’re supposed to give tzedakah to anyone that asks, without investigation.
It is absolutely proper chinuch for yeshivas to train talmidim to engage in the humongous mitzvah of collecting tzedakah. Some Yeshivas have this chinuch all year, with the talmidim (from age 7 through beis medrash) collecting tzedakah year-round, not just on Purim. Tremendous kudos to them and their lucky talmidim.