besides. hows the fbi going to get YOUR IP.
They ask the network for its logs, which will record your IP when you join. If the network refuses, they get a court order that FORCES the network to hand over the logs. Easy.
If you turn out to be using a bouncer, they contact the shell admins and do the same thing.
I don't know what law and justice classes you've been attending, but this is VERY basic.
Besides which... when asked, most networks will probably supply such information
even if they are not obliged to do so. Why? Because they don't like paedophiles either, or because they don't want the unnecessary attention and legal bills that will arise from picking a fight with law enforcement. Like it or not, this is the real world.
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