The organizer of the Charlotte Poly Meetup ran across an issue where members' profiles could be searchable through Google.  
He asked for some tips on improving privacy so that folks who don't want to be out as poly could protect themselves.
Here's what I wrote back to him...tips to keep your profile from being unseen.  This is for any current or future prospective members.  Hopefully you'll find it helpful!

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As I understand it, there are various ways to play with privacy for your own profile to different levels.
If you go up to Your Meetup Account, there are email settings, and you can set it so only members of your group or the organizers can contact you.
Then for EACH meetup you are a member of, you need to look at the side of your profile on each meetup and click "Hide your other meetups" and "hide your interests".
That's the first thing to do for anyone worrying about privacy.
If that's still not enough, then I would recommend not putting a last name in your profile if you're truly worried about someone googling you.  Notice on mine, I'm simply Robert.  
Or just use a last initial.  Because if you simply google "Robert Meetup" you won't find me. 
Another member uses his middle name if I recall.  
We have some with full names, but instead of a picture of their face, it's something less obvious  (hat and sunglasses or a picture of their dog or whatever.)    
We also have members who have created another meetup profile just for us. 
For example, their main gmail address goes to an account for professional meetups then they have a hotmail address they use for the poly meetup.  (Many lgbt people do it for those types of meetups as well.)
It takes some getting creative but I feel it's well worth the effort!
Hope that helps!!!
-Rob