Yes, sorry, I meant NOTICE.
I understand the reason you explain for using NOTICE, but whenever we have our bot display help or results or anything, we get complaints from people in lots of different channels, since NOTICE often shows up very loudly and across windows or channels. At any rate, I don't think make it configurable would harm anyone, and the default could still be NOTICE if you like.
FWIW, no other IRC bots I've ever used use NOTICE for interaction. They all message the channel or user directly.