Basically take this https://www.mightyape.co.nz/wishlist/[email protected]… and replace [email protected] with anyone's email address. It will show either the full name or full name + date of birth.
When reported to MA, their response is:
My apologies for any inconvenience this has caused you, would you like me to adjust the date of birth field? Please note that the location does not specify any address details this is to help a friend to locate your wishlist as occasionally your name can be identical to another person.
I hope this makes sense, I look forward to hearing from you again soon.
Best to change your account details and birthdate to something generic.
via Reddit
Update: Looks like they've fixed the issue.
Protecting the interests of our customers is extremely important to us. From today onwards, all new Wish Lists will be created as private by default. Customers will still be free to share links to their Wish List with loved ones, but their list will not show up in our 'Find a Friend's Wish List' search.
We have also removed the year from the birth date field in our search results. Additionally, you must now opt-in to showing your birth date from the 'Edit List' menu on each of your Wish Lists. The purpose of the birth date is to make it easier for people to identify a Wish List as yours, but we understand this information can be sensitive.
To give everyone the opportunity to decide if they would like their Wish List to be searchable; all existing Wish Lists have been set to private.
If you would like your Wish List to remain private, you don't need to do a thing. If you would like your friends and family to be able to search for your Wish List, you will need to navigate to your Wish List, scroll to the bottom of the page and click 'Make my Wish List public'. Your Wish List will then be viewable from the 'Find a Friend's Wish List' page if someone searches for your full name or your email address. Each Wish List has its own independent privacy settings so you will need to update each list individually.
View your Wish Lists:
https://www.mightyape.co.nz/wishlist
Thank you for shopping with us,
From the monkeys at Mighty Ape! @(_)@
Mine was already set to private?