How to find out in two clicks the real name of the owner of the email or phone number using PayPal or a hole in privacy?

At leisure, I experimented with webhooks at PayPal and tried to provoke the Events so that the first ones would be generated. To do this, in my PayPal account, I created test invoices and accidentally made one to sds@gmail.com. He did it and thought that it’s unlikely that someone had such a short address and continued to struggle with hooks that have not earned so far. But what was my surprise when I noticed in my list of activities in PayPal that the same test invoice acquired a name ...
Ivan Sereda.
It became interesting to me and out of curiosity I tried to learn more about this interesting person. Which perhaps stood at the origins of Google. From search engines it was not possible to find anything; unfortunately, the name and surname turned out to be the same with the famous war hero.

But then it became interesting for me to break through even more beautiful emails in a similar way and it turned out that for example abc@gmail.com belongs to Abdul Jabbar, a@gmail.com -> Ads Sdf, b@gmail.com -> Galgla Galgal and i @ gmail. com -> Maria Victoria de la Puente, g@gmail.com -> aa, i@hotmail.com -> Sevgi tertemiz, etc. and so on.
Of course, one and a half of them do not sound realistic, for some invoices I received such notices as “Your invoice to Maria Victoria de la Puente wasn't delivered”. What is strange: paper knows and gave me a name, but I could not deliver the bill. It turns out that the old paper, as a cherry on the cake, out of the goodness of mind, checked these beautiful addresses for viability to receive mail. Perhaps because of their former beauty and excessive popularity, most of them are now abandoned. But the very hole in the privacy of the data fascinated me and I tried the phone numbers and it also worked ...
Then it became too lazy to do it manually. Of course, using the API, you can create many, many requests to PayPal and find out many, many real names of people with paper accounts not only from Gmail. Of course, paper issued data name that they themselves entered the users. Although many people enter the real ones because the delivery of the paid goods and every authorization is based on them and they must be registered in the paper.
But it turned out that in a similar way it is possible to pierce the name using the number of bodies, as now the paper is binding the accounts to the numbers of mobile phones.
I alone think that this is a hole or a button accordion, and so it should be?

PS: if someone from the readers could help with the settings of the long-suffering hooks it would be great ...