@Redruby2020
But it's also meant as in a warning about the way someone is
That's the definition of what 'red flag' means. What I'm saying is that everybody has different ones. We all have a lot in common (ie we all have a red flag response when somebody hits us) but we all have our own set, unique to us. In recognising this, we recognise that we are individuals, rather than accepting pressure to conform emotionally to some norm.
For example, if you meet a new person, and they text you 10 times a day, you might love it. Another person may have a red flag response, that tells them that 10 texts is too many for them, and that the person is too clingy, needs too much reassurance, etc. Nobody is doing anything wrong in this scenario. But a personal boundary is crossed. The same thing happens if somebody swears at you or is verbally abusive. A higher percentage of people will have a red flag response, here.
The trick is to recognise your own red flag responses, and learn how to respond accordingly. The common question is 'Is it ok for me to have this red flag response, or am I just being silly/over reacting/too sensitive/childish/weak?'
Some of us get red flag responses to spiders, and some don't. Those responses are respected by those who love us, but those who do not love and respect us will put joke spiders in our cornflakes and so on. There is no sense at all to a red flag/spider response, but it doesn't matter. It is who we are, and who we are will be respected by those who love us; it's one way to prove love for somebody, in fact.