I don't care about dating. However, I will care if an idol is messy about it - re-gifting fan gifts to a significant other, doing lovestagrams, etc. I won't unstan but I'll just think the idol is dumb and it'll affect my opinion of them.
On a similar note, also don't care about "dumb" controversies - idols who get dragged for not knowing something historical, mis-using a word, etc. The unfortunate truth is most idols did not get proper school education, but I'm not stanning idols for their intelligence or book smarts.
Also for the most part, I am lenient on things like cultural appropriation AS LONG AS the idol/company acknowledges the mistake and doesn't repeat it. If it's a repetitive issue, it'll make me think the company is incompetent and that will also affect how I stan.
Same with drugs like marijuana tbh, I wouldn't want my idol to do it because of the serious consequences in South Korea but it's not a moral issue for me.
Things that I would unstan for: assault, drunk driving, financial fraud/scamming others, grooming minors, etc. Really needs to have serious active harm against someone else.