I don't know how common it is to be on email lists outside of academia. For those of you who don't know about them, usually they are email groups related to one theme or another. The messages are usually announcements or discussions on particular themes.

On occasion a personal email gets sent out to the whole email list (which can number from a dozen people to a few thousand depending on the list). Usually it is silly reading the message, but a few times in can be downright entertaining (for everyone) and terribly embarassing (for the sender).

For example, I got this email from a list I am on:

[The first part lists some concerns about the scheduling of an upcoming conference - then it continues]
"This is just my personal opinion, after 5 days of eating my way through London. I smuggled back some Absinthe (illegal in the USA), and M. and I are planning a 19th-century Oscar Wilde (small) party if you are interested. Gotta try everything once, including the Green Fairy. K.M. (the lazy-as-all-get-out room scheduling person) has had more than enough time to sit down at her desk and open up the room schedule, which takes all of a minute."

So about 1000 people or so got this message that was obviously intended for one person. Now these people know that this person smuggles illegal liquor into the country, pigs out when traveling abroad, holds small intoxicating parties, does not have a high opinion of K.M. (I have removed the name), and has tried the Green Fairy at least once.

Keep in mind that this is a professor at a well-known university. Hee hee.

Lesson of the day: don't email out anything you might not want thousand of eyes reading.