Ignoring notices

    (setq erc-hide-list '("JOIN" "PART" "QUIT"))

See also ErcChannelTracking for how to disable modeline notifications.

Ignoring nicks temporarily

Use the /IGNORE nick command to ignore a nick for this session. Since nothing gets set, next time you will see messages from this nick again.

Ignoring nicks permanently

You need to customize ‘erc-ignore-list’, or set it as follows:

    (setq erc-ignore-list '("lamer"))

The list contains regular expressions which are matched against “nick!login@host”, so you might also set it as follows:

    (setq erc-ignore-list '("^j[a-z]*bot!" "^fussbot!" "^shorten!"))

If you use BitlBee or another jabber to irc gateway and are on Google+, you might want to ignore the “all of the people in my circles” presence:

    (setq erc-ignore-list '("*"))

Conference mode snippet

Got the idea from X-Chat, conference mode disables joins, parts and quits in channels where it’s turned on. Unfortunately it doesn’t work, i think because functions somewhere don’t respect the buffer local setting of ERC-HIDE-LIST, or maybe it’s just my ERC that’s old, I’ll investigate later. 😊 (Join ignore works.) RichardKlinda

;; conference mode
(setq erc-conference-p nil)

(defun erc-cmd-CONFERENCE (&optional force)
  (if (and (boundp 'erc-conference-p)
        (setq erc-conference-p nil
              erc-hide-list (default-value 'erc-hide-list))
        (erc-display-line (erc-make-notice "Conference mode is OFF.")
        (make-local-variable 'erc-hide-list)
        (make-local-variable 'erc-conference-p) 
        (setq erc-conference-p t
              erc-hide-list '("JOIN" "PART" "QUIT"))
        (erc-display-line (erc-make-notice "Conference mode is ON.")

Ignoring some content

Sometimes people start playing with bots until it gets on your nerves. Here is how to stop it. You can ignore the bots themselves using erc-ignore-list, but you need something else to ignore the bot commands.

    (defcustom erc-foolish-content '("^<.*?> \\?" "^<.*?> , *rr"
                                     "\\*CLICK\\*" "\\*BANG\\*")
      "Regular expressions to identify foolish content.
    Usually what happens is that you add the bots to
    `erc-ignore-list' and the bot commands to this list."
      :group 'erc
      :type '(repeat regexp))
    (defun erc-foolish-content (msg)
      "Check whether MSG is foolish."
      (erc-list-match erc-foolish-content msg))
    (add-hook 'erc-insert-pre-hook
	      (lambda (s)
		(when (erc-foolish-content s)
		  (setq erc-insert-this nil))))

See also: ErcHighlighting