Paul Johnson writes:
> By design, IRC encourages people to do truly obnoxious things, like spamming
> the channel to announce they're going away, or indicating their status with
> nicknames (which also spams the channel). You also get spammed on IRC
> whenever someone joins or leaves a channel. Jabber prevents this by
> providing a real presence system.
Wrong. It is (bad) social habits that cause people to notify channels
when they go away, not the design of IRC. (In many channels, that
kind of antisocial spam is grounds for a ban.) IRC's AWAY, WHO,
WHOIS, and related messages provide adequate presence notification.