I tend to tell people I'm using "software called Keyclone, which broadcasts keystrokes from one client to the other four! It's pretty cool!" before they have a chance to wonder what evil hacks I'm running. Though it's probably not necessary, the denizens of Horde side Lightbringer tend to be incredibly cool about multiboxing. Since I started my current team (using proper multiboxer naming conventions this time, dontchaknow), I get at least a whisper or /say each session, which often turns into a short conversation involving me pimping Keyclone and them promising to check out the forums.

I'm trying to think ... I'm pretty sure the closest thing to a negative comment I've gotten in two months multiboxing was a dude letting me know that it was against the ToS and I could get banned for it, so I should be careful, but good luck anyway, looks like fun. *shrug*