Here's a quote from the IRC Primer about etiquette :
Remember, people on IRC form their opinions about you only by your actions, writings and comments, so think before you type. If you use offensive words, you'll be frowned upon. Do not "dump" to a channel or user, (send large amounts of unwanted information). This is likely to get you kicked off the channel or killed off from IRC. Dumping causes network "burps", connections going down because servers cannot handle the large amount of traffic anymore. Other prohibited actions include:
Can be added to that list :
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