Yes, definitely, when it comes to this topic.
The people I mentioned aren't friends - just acquaintances - and both men a good few years older than me (I'm female, by the way). I wouldn't feel comfortable approaching either of them for advice.
I'm also keen to avoid my personal life becoming the topic of local gossip, especially as I'm well known due to various things I'm involved with.
I have confided in one friend, who I had always considered open-minded but she was very negative about the whole concept of polyamory. Otherwise I haven't felt comfortable to discuss the topic with friends.