Evaluate two issues that influence the unsporting behavior of some spactators
From Internet:
There is often a lot of hype surrounding important matches, so fans show up very excited to see the outcome. This excitement causes some people to lose their cool, and act as they wouldn’t normally.
Most fans are generally civil and reasonable people but can be easily influenced by the actions of a few. More often than not, violence at sporting events comes from the actions of a select few individuals who sought to pick fights or hurt someone else. Even though it was only a few people, seeing one of their own get attacked by the other side can make any fan angry. Rude chanting and bad relations can fan these flames quite well.