I would have them all imprisoned until they became Hanafis :P ...not that i have anything against other Madhabs but their attack on Hanafiya is the most severe, Hence the punishment. Make them wear shalwar Kameez, or whatever they wanna wear saying Proud to be a Hanafi, and make sure they pray like Hanafis, and then make them give small bayans in gatherings about Hanafi Madhab and its Dalail. That would be one punishment :P
There is one more thing i have noticed, one will not find Nur on their faces, i dont know if its just me