Could I? Yes. Will I? Probably not. But it would be possible for a third party to create such a component.
I did at one stage write a tcl replacement for the notes module (because I hated that module) which was to become part of netbots.tcl, but abandoned it. These days, if I send/receive more than one bot note in a month, it's been a busy one.
only the hub bot on my botnet has the notes module loaded, I dont see any reason for the leaf bots to have the module turned on. of course correct me if I am wrong someone.