Gedmatch privacy

[Phoenix]

An Ancestry contact is asking me to upload to Gedmatch, so she can work out how we are related.

This potentially affects sib's child and cousin as well.

Can you set information so that it is only available to one other person?

I know that Gedmatch has different privacy rules to Ancestry. Seeing information I have given naively to fellow researchers in the past plastered all over Ancestry, I am extremely reluctant to divulge information that could - say - affect sib's child in fifty years time.

If you have used Gedmatch, have you read all the privacy notices? Are there any aspects which concern you?

In so many instances, once you have released information, you lose all control over it. Is that the case with Gedmatch?