Teams Webinar without a registration form - unable to see who has accepted or not.

We have a webinar where we wanted to invite contacts and not have them register. 

We set this up as a Teams Webinar, then added the invite list as attendees. This did two things which doesnt seem right:

1. Each attendees was sent an email with all the other attendees listed in the to box - they can see who was invited. This is a GDPR risk and there is no option to turn this off.
2. If the person accepts or declines, this data doesn't go back into the the list, they're all listed as 'No Response'

If we do this again, we'll set up the webinar and send the invites from Outlook, but the two things about feel like bugs.