This fund collection drive is a proxy way to profile houses into regime supporting and regime opposing ones at the most micro level. Can be used for any kind of nefarious purpose.
For example, the men who collected funds in my apartment already know by now how many flats are regime supporting flats, how many are regime opposing flats and which are they specifically. Having that kind of information can be quite dangerous.
Many oppose availability of booth level polling details as it can adversely affect voters of those booths and infringe on their privacy. This is much worse than that. And it can be used for many other shady things, not just poll management.