My experiences, though a few years old, boil down to this: * Spam isn't really a problem if you only allow members to send mails to the list * Moderation effo

My experiences, though a few years old, boil down to this: * Spam isn't really a problem if you only allow members to send mails to the list * Moderation effort really depends on the size. If you have 10 or maybe 20 well-behaving members, no moderation effort at all. If you 2k people getting into vim-vs-emacs flamewars, good luck...