Please make sure you change the constitution of Pakistan that allows freedom of speech and exercise of religion... and GOOD LUCK WITH THAT! And once you've done that, show to the world whatever is left of the beautiful face of a secular Pakistan.
Try and make a distinction between cause and effect. Just because the spineless government and its structure can't ensure the safety of people, should the processions be banned? Instead, we should probably seek and elect those people into power who can enforce laws because of their good character, but that to happen, we as a nation will need to also lift our character and get out of the shells of ignorance, naivety and selfishness. Just think, the most "dangerous" province in Pakistan, KPK, didn't have a single incident like this. The first thing that would come to mind is probably better preparation and organization they had in place.
Such processions have been there for decades upon decades... and before Pakistan was such a bipolar society, they used to be an event for the entire nation and not just one sect.
For those on this forum who can think, I have a question: If household "accidental self-finger-cutting" incidents suddenly increase in society, would the society ever ask to ban oranges?