PORTLAND, Maine (AP) – Roadside campaign signs have begun appearing in Portland expressing opposition to a ballot question seeking to legalize recreational use of marijuana. Voters in Portland are being asked next Tuesday whether they want to make it legal for adults 21 and over to possess – but not purchase or sell – up to 2.5 ounces of pot in the city. There hasn’t been any organized opposition to the referendum, but campaign signs this week have popped up saying: “Future Portland. Vote NO on Question 1. NO to POTland.” The identity of the opposition is a mystery and the signs don’t indicate who paid for them. Regardless of the outcome of Tuesday’s vote, marijuana use will remain illegal under state and federal law.