buckeyehunter,
I am unsure of phpII is - from a quick google search I see an IRC frontend, is this what you are using?.
If you mean phpBB2, the forum software, there are generally SPAM mods that you can use. I just typed "phpbb2 spam" in google, and quickly found this one.
I have not used it so I can not and will not speak for its effectiveness, however it may be worth looking into, just be sure (as the website suggests) to clearly read the Read_me_first.txt file.
As goes for the chat, you have many options, the majority of the Website Chat scripts are commercial, however If you google around, you will find one.
Keep your mind open and you may find some Flash Chat scripts, you should look for the ability to "Kick / Ban", this will allow you to disallow specific IP addresses, which isn't perfect, but will annoy the perp's enough.