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On the negatives, sports betting has given rise to the concern of match fixing and other unfair practices in sports activities,
Yep, this. I consider sports betting as a neutral thing (neither bad, neither good), but as it usually goes with the world, if there is anything, people will try to take advantage of it to make profits, and they ruin the name of something which didn't have anything negative inherently.
...it has also led to vices and brutality among fans who may transfer aggression from lost bets on opposing fans celebrating and this has caused brutality in many places.
This is stupidity of people.