Say good morning
Do you say "good morning" to people you pass on the street? Probably not, right? I often don't. I'm anxious they are going to react badly. That they will explode up and say "how dare you say good morning to me!" or "oh my god, you are talking to me! Get away!".
In reality, the other person is far more likely to give us a smile and return our greeting. But even if they don't, we quickly realise the consequences are not that bad.