What? Who said anything about an IRC server? Are you daft? Just to spite you, I am arbitrarily opening #sciforums on irc.efnet.us (or any EFNet server). I don't care if anyone uses it. It's there.
Pseudo might of been a little quick to close the overall thread, but he is right IRC servers are nothing but problems. If it's not actual attacks on the server it's people using it to place Egg droppers or Trojan listeners. I ran an IRC server for a bit when doing a sideline project involving an underground subculture and believe me it was not fun, especially when the pet bot was getting exhausted at the amount of requests from it. On top of that the server I was running it on couldn't handle more than 6-10 connections at the same time as it was also running a forums too, so regularly it would fall over and people would be upset at the downtime. Chat servers are by far the most resource heavy project possible, you just have to imagine the speed of counter posts on sciforums ten-fold. Although saying that nothing has ever been said that if a person was to offer additions to sciforums at no cost (i.e. running a server through their own costs) that they couldn't be affiliated in someway. However that is ultimately sciforums administrators/owners decision.
You download a client and connect to the server. (ChatZilla is a good one if you're one of the numerous goons who likes Firefox or Mozilla.) Then you type /join #sciforums. Then you say things with your fingers. Dynamic Denial of Service. It's where you flood the server with requests from several different locations so that it goes titsup.
open irc client /server irc.efnet.us wait for all the pretty text to fly past and say you're connected to said server /join #sciforums,#bestiality,#kiddyporn type /msg all asl sexy?