If a person is so irresponsible to operate any vehicle-tricycles included-while drunk, he shouldn't be allowed to operate a car. Give an alcoholic just one reason why he shouldn't be riding the bike, and sure as $h!t, he'll drive. Operating a vehicle while intoxicated shows poor judgement, regardless of the vehicle being operated. I actually think that people who are publically itoxicated should also have their driving privleges revoked. Furthermore, "conditional licenses" should never be given to anybody who has a DWI.
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Je vais à vélo, donc je suis!