"I don't think the locker room would have any problem with it," Arians told Foxsports.com. "The problem would be with the fans. I think especially opposing fans. Some of the things that are said are over the top and out of control that I can imagine what some fans would say to an openly gay player."
A front office, coaching staff and well-intentioned players can control the locker room atmosphere more easily than security personnel can control 60,000 fans in a stadium.
Abusive fans can ruin the stadium experience. My family witnessed profane, drunken outbursts throughout the Pittsburgh Steelers-San Francisco 49ers game at Candlestick Park two seasons ago, to cite one personal example. My wife saw a man profanely berating another fan's 6-year-old son in the stands. The father was wearing a 49ers jersey, but the small child seated on his lap had on a Steelers jersey.
Teams have taken measures to improve the atmosphere. The 49ers have had police go undercover as opposing teams' fans in an effort to crack down on the abuse. I would still advise against taking small children to a game in most cases.