Can I offer some advice based on my own personal experiences: it is slightly off topic in that it is not about the initial telephone screening as such, however, it is related to safety on outcalls and I think should form part of your screening when visiting a new customer for the first time. When your outcall had been arranged and you go to the premises, do NOT walk into a premises where the door has been left open for you i.e. you ring the doorbell and they say "the doors open, come in, I'm just in the shower/kitchen/on the phone, etc.". I went on an outcall that I had reservations about (which I will explain later) and when I arrived even more alarm bells started to ring. I knocked the door and did not receive an answer. I then knocked again and realised that the door was open. Opening the door just a crack and without stepping inside I called out quietly and said, "hello, it's so and so, I then heard a low voice call out, let yourself in the door is open. So I stepped inside and the person I was visiting was hiding behind the front door and closed and locked it behind me. From there on in it went badly downhill. I asked the person to open the door as I had changed my mind (he had lied to me)(when he called originally, I asked him if he was black and he said no and asked me why, I explained that I do not see black guys (prior to go independent, I've been robbed multiple times working in other people's flats and in saunas and avoided a further 6 attempted robberies by exercising this rule - first robbery was at gun point by a white guy, the next 4 actual robberies were black guys working singularly or in a pairs and six attempted robberies all of which were black - at that time I felt the amount of problem customers (as I did see black guys originally and the few that I saw were fine) compared to any other race who caused problems was vastly disproportionate. This also contributed to part of the overall reason why I gave up sex work - far too dangerous). Anyway back to the topic! I asked to leave and to cut a long story short, I was forced to have sex with someone I did not want too, physically roughed up, threatened, robbed and falsely imprisoned and held against my will for close to three hours (it was reported to the police). If he had opened the door as normal when I knocked, I would have had those few but critically important seconds to make a judgement call and walk away and sometimes it's those 4-5 seconds that could save your life. NEVER walk into an open door when you don't know what's behind it. Also when you ring the doorbell stand back from the door a few feet or slightly to one side of the door. If he opens the door and you decide that you've changed your mind and you don't want to stay when you've seen him, just politely say I'm sorry I've left my purse in the car, I'll be back in a second and walk away. (You can make your excuses later from the safety of the car).