In December, the River North Residents Association, a 22,000-member nonprofit neighborhood advocacy group, sent a letter to Ald. Walter Burnett, 27th; Ald. Brendan Reilly, 42nd ; and Ald. Brian Hopkins, 2nd, expressing concern over the Bally’s Freedom Center proposal. The letter, which is posted on the group’s website, said noise, traffic congestion and crime would likely be exacerbated by the casino, “negatively impacting” home values and local businesses, the group said.