Actually foul language is against the rules. So, the play devil's advocate, if a fan is prone to obscene outbursts then maybe they they should stay home and not the kids?
Side note- do fans that yell at refs think the refs can hear them?
Rules:
UT and SEC Fan Code of Conduct
In the spirit of sportsmanship, fans shall:
Conduct themselves in a manner that represents UT, the Southeastern Conference and the NCAA with honor, dignity and respect.
Demonstrate qualities of civility and sportsmanship at all times.
Not use vulgar, abusive, racist, sexist, demeaning, or intimidating language at any time.
Support the players, coaches and officials in a positive manner.
Treat the visiting team, coaches and fans with courtesy and respect at all times.
Not engage in cheers that are vulgar, crass or demeaning.
Refrain from throwing objects onto the floor for any reason.
Not become inebriated or belligerent.
Refrain from entering playing and team areas at any time, including the game.
Be a positive role model for those around you by treating others with courtesy and respect!