Whenever you meet someone for the first time, pick a neutral, public place and let at least 2 people know where you will be and what you will be doing. When I used to date, I'd select a restaurant or coffee shop near a mall and have one of my girlfriends casually "bump into me" and act like she hasn't seen me in forever. And if I said, "So, how old are your kids now?" she knew the date was NOT going well and that I needed her. Then she would either pull up a chair next to us and break up the "date" (option 1) or she just grabbed my arm and said, "They're right in the store with my hubby. Do you want to see them for yourself?" and she whisked me away right then and there (option 2). The choice was based on whether the vibe she got was 'nice guy, but just not working', (option 1) or 'psycho guy who might stalk you in the future' (option 2). I never let the person know my full name or where exactly I lived and I often selected a place in another part of town to meet, so the 'psychos" were much less likely to be able to track me down after the disastrous date. Then, when my friends needed date interference, I provided the exact same service for them. May seem odd, but it worked and was actually very safe and effective.