Simple Question: Is Honorbuddy a threat to VAC (Valve Anti Cheat)? Is it save (for my steam account, not Wow) to Bot in WoW while playing Mw3?
WoW has nothing to do with Steam and HB doesnt work with MW3, so I dont really see what you are worried about.
HB doesn't modify anything related to any Steam game, so I don't see a reason why it shouldn't be safe.