on mods:TEXT:!dvoice* part devoices them. The 2nd part voices them back if you change your mind. =p
To devoice for 2 minutes type: !dvoice Username 120
The "Reason:" bit was me messing around with ideas. That part can be deleted:
/msg # 12,1 Reason: $4-
!voice will just override the timer like if you !dvoice someone for an hour and change your mind like 10 minutes into the wait. And yes hopping will mess this up. I'll write you a bit to stop that tonight. =p