As far as I have seen, subjective questions are frowned upon at Stack Overflow. Given that
- Google is often overrun with spam and therefore not reliable to answer subjective / comparative queries;
- SO is already a knowledge-based community with a built-in trust (aka reputation) system;
I suggest the powers that be implement a system which
- Software-development related subjective and argumentative questions could be made (maybe in a separate area or sister SE site);
- Reputation-whoring is discouraged, maybe doing away entirely with reputation points in such questions.
I know there's a thing called Community Wiki, but it doesn't seem to be intended for this scenario, and common users cannot start one anyway.