While the help file may be improved in numberous ways (and I keep hoping for a general overhaul), I'd like to object to the whole "channels affected" thing. A disconnect always affects the whole network connection, it simply is not related to any particular channel, even though you may link it to channels with a script. Likewise a user does not quit one or more particular channels - if he quits, he leaves the whole network.
There are numberous other events not related to a specific channel by the same token, yet scripts may require to link them - are all of them in need of the same "improvement"? Some other time, you might want to relate this or that event to a different identifier - itemizing each and every possibility does not look like the right route to me, especially as you could tie virtually every identifier to virtually every event.