It may be helpful to look at another site that has many opinion based questions: [Parenting](https://parenting.stackexchange.com/help/on-topic)


> We welcome questions on topics like these:
> 
>    - matters of upbringing,
>    - safety considerations,
>    - food and feeding,
>    - health and hygiene,
>    - development and growth,
>    - language development,
>    - behavior and social skills,
>    - discipline and punishment,
>    - childrens'/family games for developmental purposes or parental sanity.

A lot of those sound like opinion based answers would be everywhere. How do they handle this? From their [Don't Ask](https://parenting.stackexchange.com/help/dont-ask) page:

> Some subjective questions are allowed, but “subjective” does not mean
> “anything goes”. All subjective questions are expected to be
> constructive. What does that mean? Constructive subjective questions:
> 
>    - inspire answers that explain “why” and “how”
>    - tend to have long, not short, answers
>    - have a constructive, fair, and impartial tone
>    - invite sharing experiences over opinions
>    - insist that opinion be backed up with facts and references
>    - are more than just mindless social fun

If we follow similar guidelines, and receive answers that meet the above points, the subjectivity of moderating human nature will make a good addition to the SE network.