The best way to dispose of a hated mohawk is to scalp the head that wears it with a rusty hatchet; make sure the hatchet is very dull, covered with nicks, if you wish to provide the utmost discomfort.
Then you bring a bucket of gasoline over to your victim, and then deposit the scalped mohawk into the bucket and set it ablaze; make certain the bucket is close enough to the victim so that he can breathe in the gas fumes and smoke.
And there you go; one ugly mohawk annihilated.