A funny case of spamming has happened recently:
Prehistory
Some time ago I took part in the competition for one scientific grant. Accordingly, passed the registration and the like.
The competition was held, but the organizers decided to send out an informational message:

... and further in the text.
At the end of the message kindly provided a link to unsubscribe from the newsletter.
#############################################################
This message is sent to you because you are subscribed to
the mailing list <mailinglist@example.com>;;.
To unsubscribe, E-mail to: <mailinglist-off@example.com>;;
To switch to the DIGEST mode, E-mail to <mailinglist-digest@example.com>;;
To switch to the INDEX mode, E-mail to <mailinglist-index@example.com>;;
Send administrative queries to <mailinglist-request@example.com>;;
')
Story
Many of the people on the mailing list decided to unsubscribe from it, they wrote to mailinglist-off@example.com.
But the webmaster seemed to be celebrating Cosmonautics Day, probably by creating a pseudonym for the unsubscribe address in the form of the mailing address itself. As a result, all requests for unsubscribe began to be sent to the whole group:

(original message - below)
PS
Funny observation: after a short time, this spamming list began to take on the features of a social network.
- Please do not send any more emails concerning the NAIRIT Workshop to my mail.
- WHY DO I GET LETTERS FROM YOU, HAVE NO RELATIONSHIP TO ME? BE CAREFUL AT SENDING, PLEASE !!!
- Colleagues, let me give a few explanations. Apparently, NAIRIT has created a special newsletter: it is enough to send an email to mailinglist@example.com and this email is sent to all addresses subscribed to the newsletter, that is, we are with you. Therefore, the only way to stop this spam is not to write anything to this address, which I suggest you do :)
- No one will leave this mailing list. Distributors.
- Everyone smacks in this chat!
- Dear Colleagues. Good mood to all members of the list! :) Anton
- At least someone positively perceives spam of Narita)))
- IN SPAM! INNOVATORS IT ITALIANS !!!
- Great master class)))) checked the mailbox update speed)))
- Cool chat, I like it :) Now I will score NAIRIT in SPAM;))