I would be uncomfortable too. But, sometimes if you can get pass the initial uncomfortable part, having someone you know, further along, can provide a new friend, someone supportive in a way you have not realized yet.

However, I can totally understand how it can be "too" uncomfortable. I think when these groups take place and someone "new" wants to join, it would be wise if the group was given to potential new member's name to make sure that this new member isn't going to trigger anyone who may know this new possible member. It is such a delicate subject and it is only fair to the members to help them feel comfortable in a group they have already been acclimating to.

(((Hugs)))
OE