CONCORD, N.H. — Three parents and a grandparent have sued a New Hampshire school district, saying their rights were violated when they were barred from school grounds for wearing pink wristbands with “XX,” representing the female chromosome pair, in protest of a transgender girl playing in a girls soccer game.The lawsuit filed Monday in U.S. District Court in Concord followed a Sept. 17 match at Bow High School against Plymouth Regional High School. A 15-year-old transgender girl is playing on the Plymouth team as she and another teen challenge a New Hampshire ban in court. Two of the parents whose daughters play for Bow wore the wristbands during the second half of the game to “silently express their opinion about the importance of reserving women’s sports for biological females,” according to their lawsuit filed by attorneys from the Institute for Free Speech. The lawsuit said school officials and a local police officer confronted the parents during the game, telling them to remove the wristbands or leave. The plaintiffs refused, citing their First Amendment rights, then said they were threatened with arrest for trespassing. At one point, the referee stopped the game and said that Bow High School would forfeit if the plaintiffs did not remove their wristbands, the lawsuit said. The wristbands were removed and the game resumed. Following the game, the two parents received “No Trespass Orders” banning them from school grounds …