NORTH BERWICK, Scotland—This seaside town is a well-heeled sort of place. Visitors come to enjoy its pretty harbor and sandy beaches. Golfers make it their base to play historic courses nearby. Away from the ice cream cones and sunhats, trouble is afoot. Someone is venturing out at night with super glue and cans of expanding foam to tackle an unwelcome influx of invaders: parking meters. Dozens of the black and blue pillars have been sprayed since they began sprouting earlier this year. The company contracted by the local council to install them and raise some money is baffled. “We have…