User blog comment:Gemmaniac/Possibilities of SnowBird being a thing/@comment-4023909-20180215045606/@comment-4010415-20180215145308

Once the age gap reaches 20 years is when some people start getting uncomfortable, and it makes people more uncomfortable if the younger of the two is still in their early 20s.

One reason people are so uncomfortable about large age gaps is because some of the people out there who seek to date someone much younger than them are actually doing it for negative reasons - because someone who is in their teens is less experienced with dating, less mature, and more likely to not see red flags that they're being manipulated or that the person they're with is abusive. Sometimes that danger can still be around for someone in their early 20s, when it comes to the red flags for manipulation and such. In order to protect these people, some people just call for people who are significantly older than them to not date them.

Undoubtedly, Qrow would not be gross and manipulate Winter, but the approximate 20 year age gap when Winter is in her early 20s still makes some people uncomfortable.

Hell, maybe some people are thinking about the fact that, when Winter turns 30, Qrow will be about 50. He'll be considered an old man, while Winter is merely an adult who still has a ways to go before she's old.