2: Rig your smoke detector to go off at a specific time. 5 minutes before it goes off, tell your guests that you need to make a phone call. Step outside and and disappear. When they finally give up trying to shut up your bogus smoke detector, they will leave.
3: If you do not have a trick smoke detector, surreptitiously stick an old blanket or coat into the oven and turn on the broiler to smoke them out.
4: If all else fails, use tear gas or a stun grenade. If this doesn't work, use a real grenade.