Fetcurious.
I see from your recent post that your proposed play examination is due in the next day or so. Given that you have uncertainties I would definitely recommend that you at least postpone your arrangement for the time being whilst you examine and consider what I'm about to say.
I've been a playdoc for some 23 years and have always encouraged my proposed patients to follow my recommendations, even though I know that I'm safe to be with. They need to meet me feeling fully safe and confident about all aspects of our meeting if they, and I, are to get the best out of it. I'll state my recommendations and my procedure in chronological order.
1. Talk to your proposed playdoc at length, preferably by IM or email so you can archive your chat for review later. Ask as many questions as you need to establish the playdoc's experience and competence. Find out exactly what is proposed for the examination.
2. If you decide that you'd like to meet then ask for at least three referees from amongst the playdocs existing patients. You'll need to at least email with them directly, preferably IM chat with them and preferably they should be Zity members too. They probably won't discuss their personal experiences with the playdoc but they will confirm if he's safe, sane and respectful.
3. Insist that the playdoc gives you his real name and at a meeting brings photoID to support that. Obtain his vehicle description and registration plate details. You should give these details to a good and trusted friend, if necessary in a sealed envelope. That person will be your Safe Person and they need only know that you are meeting someone new. Tell them where the meeting is to be, room number too if possible.
4. Check the details when you meet up. If they tally then call your Safe Person from a public venue such as a coffee shop and say all seems well. Arrange to call at specified intervals to say all is still OK - and again when you leave. Make sure your playdoc knows you have done all of this.
No genuine and responsible playdoc will be bothered by these precautions. If there are problems with the personal details or an unwillingness to comply then you must walk away - swiftly. If you feel uneasy then you're not going to enjoy the meeting and you may be at risk. Remember that even with those precautions there is still risk in being alone with a virtual stranger.
I know that all of what I have said might seem irksome and might result in you not meeting. My maxim though is - Play Nice, but Play Safe!