I once got LinkedIn invitations in the name of a American who was totally unknown to me. When it finally occurred to me to search my correspondence for his name, I learned that this was a banned Wikipedia editor who had written one email to my professional email address to advertise his evidently psychosis-induced website. I had never answered.
Here is my complete correspondence with LinkedIn after I found this out.
----- My first email to LinkedIn ----- Mon, 23 May 2011 08:37:04 UTC
It is an impertinence to send "invitations" to people who are not even
using your service, based on email address books of your users. It is
almost criminal to repeat them periodically and not to include the
usual spam opt-out links with these unsolicited messages.
I keep getting such reminders "from" a person who I do not know and
who was banned from Wikipedia for stalking and making threats.
You *will* add the following email addresses to your "do not contact"
list. Your confirmation that you have done so will be the last
communication that I will receive from your servers.
[my 2 email addresses deleted]
----- My second email to LinkedIn ----- Tue, 24 May 2011 10:58:27 UTC
May I ask you to confirm that you have received the message below and
that it will be handled. I am somewhat reluctant to go public with
[quotation of my first email deleted]
----- First email from LinkedIn to me ----- Tue, 24 May 2011 11:03:21 UTC
We’ve received your message and we’re working to get you an answer. If you have a Premium account or you’re a LinkedIn Ads customer, we strive to reply within 24 hours. For all other members, we do our best to respond within 48 hoursbut at times we do see delays. We’ll get back to you soon!
[quotation of my *second* email deleted; I never received such a confirmation for my first email, even though this one looks like an auto-response]
----- Second email from LinkedIn to me ----- Wed, 25 May 2011 15:40:33 UTC [55 hours after my first email]
Thank you for bringing this issue to my attention.
Per your request, the email addresses provided have been added to our "do not contact" list. You will no longer receive any email from LinkedIn or our members on these email addresses. If you decide at a later date that you want to set up a LinkedIn account, you will need to first contact us to have your email addresses removed from the “do not contact” list.
If you have further questions, please feel free to reply to this message.
[some first name deleted]
LinkedIn Customer Service