I've been sending out the email below all morning, and I thought I'd put it here too. There's an amusing Montaigne essay from this episode that wants to be written but right now wouldn't be prudent.
Hello
If you received a Linkedin invite you are one of a hundred or so other people who were invited without my involvement or consent.
I haven't established the exact cause but an early guess is an unauthorized auto invite/add addresses script was invoked or alternatively my account was hacked.
Sincerely
Charles Frith