Explain in a short paragraph what can trigger spectator aggression in sport

Answer 1

You'll find some material to explain this problem here:

http://www.bing.com/search?q=sports+spectator+aggression&go=Submit+Query&qs=n&form=QBRE&pq=sports+spectator+aggression&sc=0-0&sp=-1&sk=&cvid=BED0C0185ADF4D7E86F3DA906500C2FC

Answer 2

More here:

http://www.google.com/?gws_rd=ssl#q=sports+spectator+violence