While everyone knows that littering is a no-no, it may soon come with a hefty price tag for those caught discarding refuse illegally in town. Selectmen are preparing a zoning amendment for consideration by Town Meeting in May that would attach a fine to the existing antilittering bylaw. The board has directed Town Coordinator Dale Pleau to do some research to determine the parameters for setting a monetary penalty. At last week’s board meeting, Selectman John Henry suggested a $1,000 fine. In a follow-up interview, Henry said he regularly picks up trash alongside Main Street, and recently filled two large garbage bags with debris scattered on a 1-mile stretch. “I can’t rationalize why people feel it’s OK to roll down their window and throw trash out,” he said. The town’s bylaw prohibits littering, but does not carry a fine for infractions.