Young people today who can figure them out?

where i live fifgt ensued 10 young men partying between ages 19 to 21 the a 69 year old man comes walking by and he didn't say a word he went past these young men then a second or 2 they were on top beating the blue blazes on this man many police cars, a ambulance and fire truck came they took the young men in police cars but was released and hour later these fights occur alot every june, july and august every year in past 11 years and this is in orillia ontario canada