I wanted to share my idea of red flags and good first date questions to keep girls safe.
1. Have your date take you to a sit down restaurant. Watch how your date treats your waitress. This is how he will treat you later. (even better if your order is wrong, watch what he does....)
2. Ask about his relationship with his mother. (or female role model who raised him.) The reason is she taught him how to treat women. This is how he will treat you later.
3. Ask about his pets growing up. If he has too many to count there may be a problem. You will need to probe into this a bit more or turn and run. How he treats a pet dependent on him for food, water and shelter is how he will treat you later.
The pet thing is a big one because we even have laws about animal cruelty. If someone will beat a pet he will do it to you too.
I derived these three from my own abuse and observations in my life. Its better to see these things on the first date. Your not emotionally attached and able to discontinue the relationship.... no 2nd date if he fails these three.
I hope this helps!