You are treading on dangerous ground. Just like when you question why someone must kill a sheep in a public place in full view of children (SPCA), or let a certain animal wander and shit all over the streets (NEA) because it is "holy" - but relished by others in fast food restaurants?
Of course we are rational, all the 'to di piah', oranges, & whatever are littered all over the place, together with smothering ashes, jos sticks, fluttering incense papers & whatever bank notes, some half burnt, embers, candles and the list goes on...we have to live & let live. But, once again, why can't they build a communal burning area, where all the small groups in an are combine & have a communal burning & offering?? This I can never understand...communal burning & offering ..
'kill a sheep in public'...I have seen a sheep running past me, while I was waiting for a bus, some years back. I thought I was having heatstroke for the day was very hot, pinch myself & really saw a sheep, then not long after bearded men came chasing after it...then I realized that a mosque was 300m away..and it was "haji".. it was HOLY DAY.
I was rational, after all