Just got and idea, that could be easy (and fun) to implement, if I can find how to trap to all keys before they are treated by windows).
Before replying to the guy, you select his nick, press a hot key, a little window appears with the following info:
Nick in database: YES (if no, possibility to add)
On black list: NO (may be toggled)
From there, you decide if you anwser or not.
So far, this morning I replied to 5 persons. Took me 3 hours. It's not that I know everything, it is just that when you have been teaching embedded systems programming for 25 years, you know a few things that could be helpful. And your job developed this bad habit of answering questions. 
Can't wait to see how much feedback I will get from these guys. I would not be surprised if 4 out of 5 would go on my "Blacklist Manager"
Korman, any idea on how to trap all keys from keyboard? Thanks in advance!