From: me
To: me
Bcc: foo-enthusiasts
Subject: [survey] what's your favorite version?
What's your favorite version of foo? Write me off-list
and I'll post back to summarize.
Imagine the maillist of all your coworkers and you want to let them know you are selling a few items. It's not rude to force responses to be only to you. This reduces the amount of email everyone gets.
I wouldn't be surprised if such a question goes on to be ignored.