may i ask what world you people are living in?
IRC is as unkillable as file sharing, and for pretty much the same reasons

viz:

1. No-one can ever have absoloute control over every IRC network in existance.
2. In most cases, registration is simply a method to secure your alias, meaning any idiot can use it at any time, for any reason, but like minded people can assemble with minimum hassle.
3. Content control is as effective as sending a helium baloon into outer space.