UJM: These are not “petty” infractions. Its starts with selfishly leaving seforim spread around the beis medrash, then the emboldened perp ignores the pleas of the Rav to do tshuvah and engage in a week or two of “community service” and soon escalates to challenging leadership of the kiddush club and openly schmoozing with a fellow disruptor during the d’rashah. You have to stop this madness in the beginning before it spirals out of control.
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