As they are being rowdy, they do not care about the people around them who are trying to watch and hear what is going on. They should be detained so that the sports fans, players and even the coach could watch peacefully (for the former) and concentrate (for the latter two) what is going on in the match and then give useful feedback about the game later.
People who are cheering are fun and make a game better. But people who are rude, aggressive or drunk are terrible. They make everyone around them feel uncomfortable or scared. No one should have to worry about getting into a fight or having to sit next to a drunk. People who are disturbing the calm patrons should be detained.
Yes, rowdy fans at sports events should be detained, because they interrupt others. A person that is very rowdy can be guilty of disturbing the peace, because they prevent others from enjoying the game. They can also interfere with the game entirely. They should not be allowed to ruin things for everybody else.
Sports fans are going to become rowdy, especially if they're passionate about their sport. If they start disturbing those around them or being a real threat to themselves or others then someone should step in and have them removed from the event. One person should not be allowed to ruin the fun for everyone else.
I think they are well with in their rights to keep these people under watch. Nobody wants to go to a game and deal with a person like this. I think they should be treated as they are, an hazard to all around them,children the most. The fans don't need to see this kinds of stuff.
Since rewiring human behavior is not an option, the most likely possible controls on fan behavior are to greatly limit alcohol consumption, enforce strict penalties for abusive behavior, and increase security.In fact, research indicates that fans with a belief that they would remain anonymous often indicate that they would consider injuring a fan, player or coach .