This spring, the Medical Marijuana Caregivers of Maine joined the usual coalition of anti-pot forces that includes active law-enforcement groups, social conservatives and public health advocates to oppose a state bill that would legalize possession of small quantities of the drug.
And it's not a good idea to use it as mouthwash. Hydrogen peroxide (in dilute form) is used as a tooth whitener (check the active ingredients on those gel-based tooth whiteners, they usually use H2O2). It also has the side effect of turning your gums pale temporarily, though it wears off in a few hours.
1 Honey can produce hydrogen peroxide and kill bacteria by dehydrating it. It can be used to treat sore gums, ulcers and other problems inside the mouth.  Use a q-tip to apply a small amount of 100% pure honey to sore areas inside your mouth. Do this three times a day for five days.