Getting a head start on Halloween pranks, Travis Dube, 17, stood on the Littleton Common waving at traffic in a marijuana leaf costume. He wanted to express his belief that marijuana should be legalized.

Getting a head start on Halloween pranks, Travis Dube, 17, stood on the Littleton Common waving at traffic in a marijuana leaf costume. He wanted to express his belief that marijuana should be legalized.

Dube, a senior at Littleton High School, said a friend picked up the costume for him, including the large plastic pot leaf and the sign saying, “Legalize.”

But as he waved to motorists with a big smile, some of whom honked and yelled their approval, Dube wanted to be sure it was known that he would not be wearing the costume in the high school Halloween parade.

“I’m not going to wear this to the school parade, knowing it is well against school rules,” he said.

He will, however, don it for a raft of parties that accompany the fall holiday.

As he stood on the corner of King Street and Great Road, Dube said he was motivated to express his views by the abundance of alcohol — a legal substance that he feels is more destructive than pot — that has led to the deaths of friends in auto accidents.

“Alcohol kills many people a day,” Dube said. “I don’t understand why it is that way, that alcohol is a legal substance, and marijuana isn’t. I know people who have died from drinking.”

He spent about two hours in his costume, waving to passers-by. He said he has the “full support” of his many friends, some of whom stood across the Common outside the Sub Shop.

“I think it should be legalized, even if it is for no more than an ounce,” Dube said. “I think it should be more than medical.”